Minnesota tree trimmer charged with manslaughter after hydraulic grapple kills coworker

Tyler Anthony Lynch, 26, was killed when a hydraulic grapple crushed his head during on-the-job horseplay in Apple Valley, Minnesota.
He was watching the shadows, not the machine
Crimmins focused on the grapple's shadow while the actual equipment moved toward his coworker's head.
Mark

What made them think playing with shadows was safe in the first place?

Mimi

They weren't thinking about safety at all. It was a moment of boredom on a job site—the kind of thing that happens when people work around heavy machinery for hours. The shadows caught their attention, and it became a game. But Crimmins lost track of what the actual machine was doing.

Mark

So he wasn't being reckless on purpose. He just wasn't paying attention.

Mimi

That's the legal distinction the charge hinges on. He wasn't trying to hurt Lynch. But he was operating a piece of equipment capable of crushing a human skull while his attention was elsewhere. The law calls that negligence that rises to the level of manslaughter.

Mark

Did anyone else see what happened?

Mimi

A witness was there. They saw the grapple hit or pinch Lynch's head as it moved toward him. So it wasn't hidden or ambiguous—someone watched it unfold in real time.

Mark

What happens to a workplace after something like this?

Mimi

That's the larger question. This wasn't a mechanical failure or a hidden hazard. It was two people doing something they shouldn't have been doing with equipment that demands full attention. It raises hard questions about training, supervision, and the culture of a job site.

Mark

Do you think the charge fits?

Mimi

That's for a jury to decide. But the facts are stark: a man is dead because someone operating heavy machinery wasn't watching what the machinery was actually doing. The law has to account for that.

  • A routine tree-trimming job in suburban Minnesota turned fatal when two coworkers began using industrial equipment as a prop in a shadow game on the street below.
  • Crimmins lost track of the real machine while fixating on its shadow, and when he closed the hydraulic grapple, it crushed Lynch's skull — a witness saw it happen, and blood on the metal jaws confirmed it.
  • Police arrived to find Lynch dead at the scene, the grapple still suspended above his body, transforming an ordinary workday into a crime scene.
  • Crimmins now faces second-degree manslaughter charges — up to ten years in prison and a $20,000 fine — with prosecutors arguing his distraction crossed the legal threshold into conscious disregard for another's life.
  • The case has reignited urgent questions about workplace safety culture, equipment protocols, and how easily the boundary between momentary amusement and irreversible tragedy can dissolve on a job site.

In Apple Valley, Minnesota, a moment of idle play between two tree trimmers became a fatal lesson in the distance between imagination and reality. Christopher Boone Crimmins, 34, was watching shadows — the silhouette of his hydraulic grapple chasing the silhouette of his coworker Tyler Lynch — while the actual machine moved toward an actual man. When he closed the grapple's jaws, Lynch, 26, was killed. The law now asks whether that inattention, however playful its origin, constitutes a conscious disregard for human life.

On a Thursday afternoon in Apple Valley, Minnesota, Tyler Anthony Lynch, 26, was cleaning up branches on a tree-trimming job when a moment of on-site amusement turned fatal. His coworker Christopher Boone Crimmins, 34, was operating a hydraulic grapple mounted to a truck when the two noticed that sunlight was casting sharp silhouettes — of the machine and of Lynch — onto the street below. They began playing with those shadows, trying to make the grapple's silhouette appear to grab Lynch's.

Crimmins was watching the shadows. He was not watching the machine. As he maneuvered the boom to position the grapple's shadow over Lynch's, the real equipment moved toward the real man. When he opened and closed the hydraulic jaws, they crushed Lynch's skull. A witness observed the grapple descend and strike Lynch's head. Police arrived to find him on the ground surrounded by blood, with catastrophic head trauma. He was pronounced dead at the scene. The grapple's metal jaws, still hanging above the body, were visibly stained with blood.

Crimmins was charged with second-degree manslaughter, with prosecutors alleging he created an unreasonable risk of death through conscious disregard — that the playfulness of the moment did not absolve him of knowing the danger the machine posed. He faces up to ten years in prison and a $20,000 fine. Bail was set at $40,000.

The case leaves behind a quiet, devastating clarity: a hydraulic grapple does not distinguish between a shadow and the man casting it, and neither does the law.

On a Thursday afternoon in Apple Valley, Minnesota, a moment of workplace distraction turned fatal. Tyler Anthony Lynch, 26, lay on the ground with catastrophic head trauma while his coworker stood nearby. He had been cleaning up branches when Christopher Boone Crimmins, 34, operating a hydraulic grapple mounted on the back of a truck, made a choice that would end Lynch's life and reshape his own.

The two men had been playing with shadows. Sunlight was casting silhouettes of both the grapple and Lynch onto the street below, and they began what police would later describe as "messing around"—trying to make the shadow of the mechanical arm appear to grab the shadow of the man. It was the kind of idle amusement that happens on job sites, a small break in the routine of physical labor. But Crimmins was not watching the actual equipment. He was watching the shadows.

As he manipulated the boom to position the grapple's shadow over Lynch's shadow, the real machine moved toward the real man's head. When Crimmins opened and closed the hydraulic grapple, it crushed Lynch's skull. A witness saw it happen—saw the grapple appear to strike or pinch Lynch's head as it descended. Police arrived to find Lynch on the ground surrounded by blood, with severe trauma to his head. He was pronounced dead at the scene.

The grapple itself bore evidence of what had occurred. Blood was visible on the metal jaws, which hung directly above Lynch's body. The machinery that had killed him remained in place, a silent record of negligence.

Authorities charged Crimmins with second-degree manslaughter. The criminal complaint alleged that he had created an unreasonable risk of death or great bodily harm through conscious disregard—that he had knowingly taken chances with another person's life. The charge carries a maximum sentence of ten years in prison and a $20,000 fine. Crimmins was held at the Dakota County Jail with bail set at $40,000 without conditions, or $20,000 if he agreed to certain restrictions.

The case raises a stark question about workplace safety and the split-second decisions that separate routine from tragedy. A hydraulic grapple is not a toy. A man's shadow is not the same as the man. The distance between play and death, in this instance, was the distance between watching shadows and watching the machine.

He and the victim were 'messing around' and saw that sunlight was casting shadows of both the grapple and the victim on the street
— Dakota County criminal complaint
Crimmins was not monitoring the actual grapple or Lynch. He then opened and closed the grapple, crushing Lynch's head
— Dakota County Attorney's Office
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