THIEF RIVER FALLS, Minn. (AP) — Police in northwestern Minnesota are searching for a man in connection with a homicide.

A federal arrest warrant has been issued for 44-year-old Erik Reinbold in connection with a murder in rural Pennington County on Friday. A federal jury in Fergus Falls in 2018 found Reinbold guilty of possessing pipe bombs at his cabin near Oklee. He was sentenced to five years in prison.

Investigators found a notebook in his desk detailing how to survive in the wilderness, build bombs and identify enemies. He also pleaded guilty in a 2015 case where he rammed his truck into a car with his wife and children inside.