A family is desperate for answers after their loved one died on the job in Burnsville on Wednesday.

Pierre Mack, 29, died after a boom truck hit him just before 9 a.m. He was a cement mixer working on improvements to Interstate 35W.

"I'm always texting him to be safe, be careful out there. I'm trying to figure out, did he get run over? How?" Bernard Harris, Mack's father, said. "Where was the spotter? I don't think my son would've been killed if he didn't have that boom truck directed that man telling what not to do."

The Minnesota Department of Labor and Industry opened an investigation that Harris hopes will reveal more answers about his son's death.

Pierre Mack

Mack's death is the fifth construction-related death in Minnesota this year and the first at a Minnesota Department of

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