A Michigan State Police trooper who was also a husband and father has died in the line of duty in Lansing. Trooper Joel Popp of the Tri-City Post was standing outside his patrol vehicle investigating a suspected impaired driver who was stopped on a curved lane of the roadway on 1-75 Wednesday evening when he was struck by a vehicle operated by an 81-year-old male. That vehicle also struck two patrol cars. Popp was transported to Hurley Medical Center where he succumbed to his injuries. The 81-year-old motorist sustained serious injuries but is expected to survive, according to police.