A Minnesota man has been accused of bludgeoning a female co-worker to death using a sledgehammer.

David Bruce Delong, 40, was charged with second degree intentional murder on November 11.

Wright County Sheriff's Office said in charging documents that Delong had confessed to the killing and said he did not like the victim, later named by her family as Amber Czech, and had been planning to kill her for some time.

Why It Matters

The murder raises questions about workplace safety. The victim’s family told CBS-affiliated WCCO that they want to raise awareness about workplace violence.

What To Know

Delong and Czech worked together at Advanced Process Technologies in Cokato, Minnesota .

Police responded at 6 a.m. on November 11 to a 911 call reporting an injured woman at the scene.

The

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