Sources tell CNN the suspect of “politically-motivated assassination” in Minnesota that targeted two lawmakers may have impersonated a police officer. CNN law enforcement analyst Jonathan Wackrow explains how the shooter’s alleged tactic could “seriously undermine” officers’ legitimacy with the public.

Law enforcement officials are searching for 57-year-old Vance Luther Boelter in the shootings of two Minnesota politicians and their spouses early Saturday morning, sources told CBS News. WCCO aerial footage shows authorities at a Green Isle home southwest of the Twin Ciies.