What happened to Amber Czech?

Amber Czech, a 20-year-old welder at Advanced Process Technologies in Cokato, Minnesota, was tragically killed by her coworker, David Bruce Delong, who allegedly bludgeoned her to death with a sledgehammer.

Who is David Bruce Delong?

David Bruce Delong, a 40-year-old man, has been accused of murdering his coworker, Amber Czech, using a sledgehammer. Delong confessed to the killing, stating that he did not like the victim and had been planning to kill her for some time.

How did the Cokato community react to the workplace violence incident?

The tragic event has deeply impacted the Cokato community, and the victim's family, friends, and coworkers are left to grieve this devastating loss. The incident has also raised concerns about workplace safety, with the victim's family expressing a desire to raise awareness about workplace violence.

Home / Crime and Justice / Coworker Accused of Sledgehammer Murder in Cokato, MN

Coworker Accused of Sledgehammer Murder in Cokato, MN

14 Nov

•

Summary

Minnesota man charged with second-degree murder
Victim identified as Amber Czech, 20, an "amazing welder"
Suspect confessed to killing coworker with a sledgehammer

Coworker Accused of Sledgehammer Murder in Cokato, MN

On November 11, 2025, a tragic workplace violence incident unfolded in Cokato, Minnesota. David Bruce Delong, a 40-year-old man, has been accused of brutally murdering his female coworker, Amber Czech, using a sledgehammer.

According to the charging documents, Delong confessed to the killing, stating that he did not like the victim and had been planning to kill her for some time. The Wright County Sheriff's Office responded to a 911 call at 6 a.m. on the day of the incident, where they found the 20-year-old victim suffering from "major head trauma with significant blood loss." A bloody sledgehammer was found near her body.

Amber Czech's family has identified her as the victim, describing her as an "amazing welder" who was passionate about her job at Advanced Process Technologies, where she and Delong worked together. The incident has raised concerns about workplace safety, with the victim's family expressing a desire to raise awareness about workplace violence.