A Malden man allegedly picked the wrong car for his road rage late Saturday morning.
Sean Sullivan, 41, reportedly threatened two brothers with racial epithets and what police described as an “extremely large knife” after the vehicle made a left-hand turn in front of him on Mt. Vernon Street.
Unbeknownst to Sullivan, the two brothers were a Malden Police detective and State Police Trooper.
Sullivan allegedly fled the scene and was later arrested near Main Street in Malden.
He was charged with assault by means of a dangerous weapon, carrying a dangerous weapon and threats to commit a crime.
Further charges could be pending, Malden Police Lt. Det. Marc Gatcomb said.Caesar can be reached at Christopher.Caesar@globe.com or via Twitter @ChrisCaesar.