Following two attacks by a man posing as police in Minnesota, Americans are wondering if they have to open the door to someone saying they're the police.

Vance Luther Boelter, 57, opened fire on Mark Hortman as police pulled up, then exchanged gunfire and fled, investigators said.

Melissa Hortman, a Democratic state assemblywoman, and her husband Mark have been assassinated by a gunman disguised as a police officer. In what officials have called a politically motivated attack,

Current and former Iowa lawmakers say they feel both sad and scared after two Minnesota lawmakers were shot in their homes by a man impersonating a police officer early Saturday morning.

Minnesota was on edge Sunday after House Democratic leader Melissa Hortman and her husband were fatally shot Saturday in their Brooklyn Park home, and state Sen. John Hoffman and his wife survived the assassin’s attack at their home in Champlin.

WARNING: Police told Brooklyn Park residents and nearby neighbors to NOT answer their doors for a lone police officer.

Search underway after man impersonating cop ‘shot two Minnesota lawmakers’ in targeted attack: report - Police in Brooklyn Park, Minnesota, are searching for a white male who allegedly opened fire Saturday morning in targeted attacks in Champlin and Brooklyn Park.

A handout photo posted by the Ramsey County Sheriff's Office appears to show Vance Luther Boelter, 57, the suspected gunman in the shooting deaths of a Minnesota Democratic state lawmaker and her husband,