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KILL DOZER — MARV HEEMEYER’S ATTACK ON A SMALL COLORADO TOWN

On June 4th, 2004, fifty-two-year-old Marvin Heemeyer went on a rampage at Granby, Colorado in an armor-fortified bulldozer he hand built for the job. In two hours and nine minutes, Heemeyer and his Kill Dozer destroyed thirteen buildings along with many vehicles, causing $7 million in damages. Fortunately, no one was injured except for Heemeyer whose life ended with a self-inflicted gunshot wound to the head.

The Granby damage was massive. It was also unprecedented. Never had anyone taken an ordinary construction bulldozer and, over the course of a year, turned it into an impenetrable war machine equal to an armed military tank.

Also unprecedented was the story behind Heemeyer’s rampage on his town. It’s a story of feuds, a story of paranoia, and a story of an ingenious man who built a single purpose machine — an assault system solely made for a devastating attack on a small Colorado town.

Here is the Kill Dozer story.

Marvin John Heemeyer was born in South Dakota. He never married and had no children. Marv, as he was known by everyone, moved to Granby, Colorado in 1992. He bought two acres of land and set up a welding and muffler repair shop. He was a highly skilled mechanic and a supreme welder. Soon, Heemeyer had a thriving business and accumulated a good deal of wealth.

Heemeyer was popular with his friends and was an avid outdoorsman, particularly a love of snowmobiling. Friends found him a natural leader and a generous soul. His Granby neighbors and town officials saw him otherwise.

The Docheff family owned an adjacent property to Heemeyer. In 1998, they applied to the Town of Granby for a rezoning application so they could build a concrete batching plant. Heemeyer opposed this and tension began.

Shortly, a sanitation issue arose about Heemeyer’s property. He managed his sewage through a non-approved holding tank and a makeshift drainfield. The town bylaws disallowed this, and officials ordered Heemeyer to hook up to the civic sanitary system. This required a lengthy pipe run and would cost Heemeyer somewhere around fifty thousand dollars to construct which he refused to pay.

The town council responded by ordering the bylaw enforcement department to fine Heemeyer daily until he complied. He still refused and eventually forked over $3,350 to avoid arrest. Heemeyer had retained a lawyer who found a loophole and had the daily fines stopped. The town council responded by working to close the loophole and continue the compliance pressure on Heemeyer.

The Docheff family gained their rezoning and began building the concrete plant. By now, their conflict, feud if you will, with Heemeyer escalated. Out of no coincidence, the shortest and most economical route for Heemeyer’s sewage run was through a short section of the Docheff property. The Docheffs were ordered by the Town of Granby to allow Heemeyer a sewage passage easement through their site.

This, the Docheffs couldn’t refuse. But they did refuse Heemeyer a further road thoroughfare through their new concrete facility which had been used under a common law understanding for years prior to Heemeyer’s arrival. Heemeyer was now landlocked and had to build a new road at an immense cost.

Heemeyer conceded when the Docheffs offered to buy Heemeyer’s shop and lot. They settled on $250,000 and had a deal. That was until Heemeyer broke it and raised the price to $375,000. The Docheffs accepted the counter. Then Heemeyer raised the stakes to a million.

The deal collapsed and Heemeyer was back facing his two problems—the sewer line and the road. Now, Marv Heemeyer was a determined man. He went to a California auction and bought a bulldozer. Most folks thought Heemeyer intended to use the dozer to build his new road. However, once Heemeyer trailered it back to Colorado he simply parked it. The front end, with its sizable blade, pointed directly at the Docheff concrete plant.

It’s important to know something about Granby. Its population was around two thousand, and it sat about an hour and a half drive northwest of Denver. It’s small town in mindset makeup with most of the council members being from long-established families—the council being a circle of good ole boys.

(Fast forward to Heemeyer’s motivation. Before starting his Kill Dozer rampage, Heemeyer tape-recorded his views of the Docheffs and specific council members. He mailed the tapes to his brother on the morning of the crimes, and they were later released to the media. If you’re at all interested in this case, it’s a must that you watch a 2020 documentary titled Tread. It’s on YouTube – Click here and you’ll hear Heemeyer’s actual voice stating his grievances and intentions. It’s an exceptionally well-filmed and edited production.

In 2002, Heemeyer was offered an out. It came from a Granby family who were expanding their garbage collection business. They purchased Heemeyer’s property and buildings for a generous sum which left Heemeyer well off financially. Part of the deal was Heemeyer retaining a lease on one shop, and inside he parked his bulldozer.

The new owners negotiated a road passage from the Docheffs and, within a week of possession, had the sewer connection built. Meanwhile, Marv Heemeyer secretly went to work modifying the machine.

Heemeyer’s bulldozer was a Komatsu D355A. Its static weight was 49 tons, and its 410-horsepower turbocharged diesel engine allowed a crawling speed of 7.35 mph. However, its pushing and pulling power was enormous.

Heemeyer began transforming the dozer into a tank by welding a shroud of double-hulled ½ inch thick steel plates separated by a 4-inch concrete liner that encased the entire driving cab, engine compartment, and vulnerable track parts. This increased the weight to 61 tons or 122,000 lbs. The shroud’s effect was equivalent to plate protection on an Abrams tank that could withstand small and medium-sized firearms and hand-thrown explosive devices.

Marv Heemeyer planned for a heavy counter-offensive. His operating compartment was completely sealed from any external environment threat, including gas attacks. He devised a filtered air conditioning system that was fan-driven and filter-backed. For sight, Heemeyer positioned six external cameras linked to three video screens that gave him a 360-degree view. Over the camera lenses, he placed 4-inch-thick, bullet-proof Lexan plastic guides. And knowing his lenses would be affected by building debris, Heemeyer installed compressed air nozzles to blow away the dust.

The ”MK Tank”, as Heemeyer called it, wasn’t just a mobile battering ram designed to knock down buildings. It was also heavily armed with three weapons set through firing ports. One was a Barret M82 50 caliber (12.7mm) semi-automatic sniper rifle. The second was a 7.62 (.303) FN FNC semi-automatic assault rifle. The third was a Ruger Mini-14 5.56 (.223), also in semi-automatic mode. (For the non-firearms folks, these are immensely reliable and capable weapons.) As well, Heemeyer had two handguns in the operating area – a 9mm pistol and a .357 Magnum revolver.

Heemeyer had his Kill Dozer fully loaded with fuel. In the mid-afternoon of June 4, 2004, he was set to go. He lowered the cabin shroud with an overhead hoist which sealed him inside with no way out. This was inherent in his design and showed he planned to fight to his end. When he was ready, he fired the beast up and burst from the shop. Straight through a wall.

Heemeyer’s first target was Docheff’s concrete plant. He rumbled over and began to smash buildings apart and crush parked vehicles. In shock and awe, the Docheffs vainly tried to stop him by jamming metal rods into the tracks and blocking the Kill Dozer’s path with their on-site machinery. That failed.

Heemeyer had his way with the Docheffs. Then he headed for town. Over a two-hour and nine-minute demolition derby, Heemeyer managed to destroy thirteen buildings and a pile of cars and trucks. He’d made a list of his victims, and he methodically carried them out.

On the list, besides the Docheffs, were the former mayor’s house, the town hall, the police station, a hardware store, a bank, and even the public library. During the rampage, every available resource was activated. The police SWAT team tried to defeat the machine with bullets and stun grenades, but these had no effect. Even climbing the “tank” was near impossible. Heemeyer planned for this as well—he’d greased the sides of the armor plates.

Heemeyer’s attack on the town might be one of the best-documented crimes ever committed. Everyone from town turned out to watch: Moms, dads, kids, and the dogs. Many had video cameras and today YouTube is loaded with the carnage.

News agencies had helicopters in the air firing live feed around the world. The Colorado Governor was also planning a helicopter thing—considering activating the National Guard with Apaches equipped with anti-tank missiles to take out Marv Heemeyer.

That never happened. Marv Heemeyer caused his own demise. While he was about to bulldoze his nemesis’s hardware store, the dozer’s radiator sprung a leak and shorted his power through overheating. As he was swathing the side of the store, Heemeyer failed to account for a basement and the right tracks became suspended in the void which stopped his traction.

The machine shut down. The rampage was over. Soon, a single gunshot rang out inside the Kill Dozer. Heemeyer put the .357 in his mouth and pulled the trigger.

It took hours before a work crew with blow torches was able to cut through the plating and remove Heemeyer’s body. The machine was eventually scrapped and the pieces were dispersed to various scrapyards—the thinking was to prevent souvenir hunters from building a shrine to what was becoming a folk hero.

Today, around the internet, there are fringe groups who worship Marv Heemeyer. Here was a man, they say, who was smothered by The Man and struck back with due vengeance.

Others see Marv Heemeyer as a crazy man, a domestic terrorist, a common criminal who, by the Grace of God didn’t kill anyone but himself. The police point out how many shots Heemeyer fired at them, and town officials pointed out that a children’s group was in the library when Heemeyer attacked.

Mentioning God, this is a good point to wrap up this post as God played an important role in Heemeyer’s determination to build the Kill Dozer and unleash its terror on the Town of Granby. Again, if you’re really interested in what made Marv Heemeyer go to such lengths to commit such an atrocity, watch the recent 2020 documentary titled Tread. It’s on YouTube – Click here and you’ll hear Heemeyer’s actual voice stating his grievances and intentions. It’s an exceptionally well-filmed and edited production.

Here are quotes from Marv Heemeyer taken from his pre-assault recordings:

“God built me for this job. I think God will bless me to get the machine done, to drive it, to do the stuff I have to do. God blessed me in advance for the task I am about to undertake. It is my duty. God has asked me to do this. It’s a cross that I am going to carry and I’m carrying it in God’s name.”

“I was always willing to be reasonable until I had to be unreasonable. Sometimes reasonable men must do unreasonable things.”

DID A DINGO REALLY GET HER BABY?

A10Azaria Chamberlain—a nine-week-old infant—disappeared from her family’s campsite at Ayers Rock (now called Uluru) in the central desert of Australia’s Northern Territory on August 17, 1980. Despite a massive search, Azaria’s body was never found and the question of whether she was taken from the tent by a wild dog or whether she was killed by her mother, Lynne (Lindy) Chamberlain, lingered on.

Lindy Chamberlain was charged with Azaria’s first-degree murder and convicted of her daughter’s slaying. After thirty-two years, eight legal proceedings, and tens of millions spent in the investigation, Lindy was finally exonerated by a coroner’s inquest that declared Azaria’s death was an accident—the result of a wild animal attack, to wit—a dingo.

The case was entirely circumstantial and supported by incriminating points of forensic evidence that convinced a jury to find Lindy Chamberlain guilty beyond a reasonable doubt. But how credible were these “forensic facts”? Where did the case go wrong? And what led to Lindy’s conviction being overturned?

A3Lindy Chamberlain, 34, her husband Michael, 38, son Aidan, 6, son Reagan, 4, and infant Azaria were on a family vacation and pitched their tent in the Ayers Rock public campground at the famous World Heritage site. At eight p.m. and well after dark, Lindy finished breast-feeding Azaria and took her to the tent—thirty feet from the picnic table where she placed the baby in a bassinet and covered her with blankets. She’d taken Aidan with her and Reagan was already asleep inside.

Lindy went to their car that was parked beside the tent and got a can of baked beans to give Aidan as a bed-time snack, then returned with Aidan to Michael at the picnic table. At 8:15 p.m Azaria cried out. Concerned, Lindy walked toward the darkness of the tent-site and claimed she saw a dingo at the opening of the unzipped tent door. It appeared to have something in its mouth and was violently shaking its head.

Lindy hopped a short parking barricade which made the animal flee into the night. She checked inside the tent.  Azaria was gone and there were fresh blood stains on the floor, bedding, and other articles. Lindy rushed out, yelling to Michael and the other campers “Help! A dingo’s got my baby!

A19The adjacent campers formed a search party which was re-enforced by authorities and local residents, eventually totaling over three hundred volunteers including Aborigine expert trackers with their dogs. Dingo paw prints were noted in the sand outside the tent and a trail was followed which showed marks indicating a dingo was partly dragging an object, periodically setting it down to possibly rest or readjust its grip. (Azaria weighed just under ten pounds.) The trail indicated its destination was toward known dingo dens at the southwest base of Ayers Rock.

By daylight, no sign of the infant was found and the search was called off. The Chamberlain family cooperated in a preliminary investigation conducted by police from the nearest town of Alice Springs, then they returned home to Mount Isa.

A4Initially, there was no doubting the Chamberlains’ story. A dingo was seen in the campground before dark by campers. Others heard a dog growl minutes prior to the baby’s cry. They also heard Lindy’s scream “A dingo got my baby!” Further, the park ranger had warned that the dingo population was increasing and becoming very aggressive. And young Aidan backed up his mother’s story of going to the tent and the car, being with Lindy throughout.

The police investigation stopped. But, seven days later, a hiker found some of the garments Azaria was dressed in, nearly three miles away by the dingo dens. The clothes were a snap-buttoned jumpsuit, a singlet, and pieces of plastic diaper, or “nappy” as they say in Australia. Still missing was a “matinee” coat that Azaria wore overtop.

A17The examination found bloodstains on the upper part of the jumpsuit which showed a jagged perforation in the left sleeve and a “V”-shaped slice in the right collar. The singlet was inside out and the diaper fragments were shredded. The police officer who retrieved the garments failed to photograph their original position as had the original police officers attending the incident failed to photograph the scene. They also failed to properly examine and photo the tent’s interior which others reported was pooled and spotted with blood.

By now the Dingo’s Got My Baby case was getting international attention and the speculative rumor mill was alive in the media. “Dingos don’t behave like that!” self-appointed experts were saying. “It’s unheard of for a dingo to do this!” “Dingos can’t run with something in their mouths!”

A15Bigotry was emerging because the Chamberlains were Seventh Day Adventists with Michael being a professional pastor. “They’re a cult!” “They believe in child sacrifice!” “They were at Ayers Rock for a ritual!” “They always dressed the baby in black!” “The name ‘Azaria’ means ‘Sacrifice in the Wilderness’!”

When the first inquest was held in February, 1981, the media was in a frenzy and the police were covering their butts. The coroner ruled Azaria’s death was due to a dingo attack, despite there being no physical body to examine, and was critical of shoddy police investigation and of certain government officials of the Northern Territory who failed to provide the police with resources to investigate.

This threw fuel on the media fire and caused the authorities to start damage control.

A7A task force was formed to re-open the case, fittingly named Operation Ochre after the red sands of Ayers. It was headed by an ambitious police Superintendent with an aggressive field detective and was overseen by a politically-protective prosecutor. Collectively, they ran the investigation with the mindset that the dingo attack was implausible and that Lindy fabricated the story because she’d killed her own kid.

On September 19, 1981, Operation Ochre did a massive round-up of the original witnesses for re-interviews and raided the Chamberlains’ home. They seized boxes of items in a search for forensic evidence and impounded their car.

The investigation theory held that Lindy took Azaria from the tent to the car where she slit her baby’s throat, then stuffed her infant’s body in a camera bag. With husband Michael’s help, and after the searchers went home, they took their daughter’s body far away to the dingo dens, buried their little girl, then planted her clothing as a decoy.

There wasn’t the slightest suggestion of motive or any consideration of how the Chamberlains were stellar in reputation.

A6The vehicle was forensically grid-searched over a three-day period by a laboratory technician with a biology background. Suspected bloodstains were found on the console, the floor, and under the dashboard which was described as at trial as an “arterial spray” pattern.

Blood was also found on various items taken from the Chamberlains’ home, known to be present in the tent at the time Azaria disappeared. The lab-tech confirmed the blood on Azaria’s jumpsuit was not only human—it was composed of 25 % fetal hemoglobin which was consistent with an infant’s blood.

This was the forensic cornerstone of the prosecution’s circumstantial case.

A8A second inquest was held in February, 1982. It was run as a prosecution—an indictment with the focus on proving a theory, rather than discovering facts. The Chamberlains were not privy to the “evidence” beforehand and had no ability to defend themselves. “Information” was presented by the lab-tech that blood from the car was consistent with fetal hemoglobin and, therefore, the baby must have bled out in the car.

Another forensic expert testified the cuts and bloodstain pattern on the jumpsuit were caused by a sharp-edged weapon, probably a pair of scissors, and were in no way caused by canine teeth.

Despite all the civilian witnesses testifying consistently as before, and corroborating the Chamberlains claims, the inquest deferred judgment and referred the case to the criminal courts.

A12

Lindy was tried for Azaria’s murder in September, 1982, and her husband was accused of being an accessory-after-the-fact. Over a hundred and fifty witnesses testified, many of those being forensic experts—some of considerable note. The Chamberlains were forced to defend themselves, funded by their church and donations by believers in their innocence. They had no access to disclosure of evidence by the prosecution and were kept on the ropes by surprise after surprise of technical evidence which they had no time nor ability to prepare a defense.

A20This trial was not just sensational in Australia. It was carried by all forms of world news—TV, radio, print, and tabloids. As big as the O.J. Simpson trial would become in America, the public were split on the question of Lindy’s guilt or innocence.

The jury bought the prosecution’s case that science was far more reliable that eye and ear witness testimony and the Chamberlains were convicted. Lindy was sentenced to life imprisonment with hard labor and Michael was given a three-year suspended sentence. A pregnant Lindy went directly to jail where their newest baby—a daughter—was born. Two appeals to Australian high courts fell on deaf ears. They found no fault in the application of law.

The Dingo Got My Baby case never faded from public interest. Many groups petitioned, calling for changes in the law and for a new, fair trial to be held. Pressure mounted on the Australian Northern Territory officials.

A18On February 02, 1986, a British rock climber fell to his death on Ayers Rock. During the search for his body, Azaria’s missing matinee jacket was found—partially buried in the sand outside a previously unknown dingo den. The examination found matching perforations in the coat consistent with the jumpsuit cuts.

News of this find caused a massive public outcry against the Northern Territory government and they reluctantly released Lindy from jail pending a re-investigation. A third inquest was a “paper” review that recommended the matter be sent back to the courts.

A Royal Commission of Inquiry into Lindy Chamberlain’s conviction was held from April, 1986, to June, 1987. It focused on the validity of the scientific evidence, rather than on legalities of court procedure.

A21The jewel of the forensic crown—the fetal hemoglobin in the family car bloodstains turned out not to be blood at all. The drops were spilled chocolate milkshake and some copper ore dust while the “arterial spray” was overspray from injected sound deadener applied at the car’s factory.

The clothing cuts became an Achilles’ Heel and toppled the case because the expert witness by now was discredited in other cases resulting in wrongful convictions. New forensic witnesses, with more advanced technological expertise, testified the cuts were entirely consistent with being mauled by a dog.

In September, 1988, the Australian High Court quashed the Chamberlains’ convictions and awarded them $1.3 million in damages—far less than their legal bills, let alone compensating their pain and suffering.

A1The High Court never said Lindy was innocent, though. It rightfully set aside her conviction but made no amends in publically proclaiming innocence.

It wasn’t until 2012, that Lindy’s perseverance forced the fourth inquest. The presiding coroner classified Azaria Chamberlain’s death as accidental—being taken and killed by a dingo.

Coroner Elizabeth Morris had the decency to publically apologize to Lindy on behalf of all Australian authorities for a horrific, systematic miscarriage of justice.

Coroner Morris also had the class not to single out individuals. Without her saying, it was evident the police, prosecution, and forensic people instinctively reacted as they’d been trained to react—and that was to individually find evidence to support their case interest and not to follow what didn’t fit.

And Coroner Morris was careful not to burn the media.

A23Lindy’s situation was a media dream, having all the elements of a thrilling novel—mystery, instinctive fears, motherhood, femininity, family, religion, politics, and an exotic location combined with courtroom and forensic drama.

And it came at the expense of an innocent human mother who’s baby girl got taken by a wild animal—probably a mother dingo instinctively trying to feed her own family.

*   *   *

Here are links to more information on the Chamberlain travesty:

Report of the Royal Commission of Inquiry  Click Here

Lindy Chamberlain – Creighton’s website  Click Here