Eric Knysz, 20, of Irons was on trial in the September shooting of 43-year-old Trooper Paul Butterfield II in Mason County.
A jury got the case Tuesday and took about two hours to convict him on the murder and other charges.
Authorities said Knysz had stolen guns with him when Butterfield pulled over his pickup truck. Knysz's wife, Sarah, testified against him.
Butterfield's fiancee, Jen Sielski, told the Ludington Daily News that justice was served in Knysz's conviction, but it doesn't bring Butterfield back.
Defense lawyer David Glancy said the only witness placing Knysz in the pickup that day is his wife, who benefited from a plea deal.