Joseph Walker, a cop with the Hudson County Prosecutor's office was arrested for

Joseph Walker, a cop with the Hudson County Prosecutor's office was arrested for allegedly shooting and killing a man on a Maryland highway after the two were involved in an altercation on the road. Walker got into a dispute with 36-year-old Joseph Harvey Jr. while both were driving on I-97 in Anne Arundel County, Md.. Walker, 40, allegedly shot Harvey after they pulled over onto the shoulder of the road. Walker's wife and three children were in the car with him at the time. Harvey was pronounced dead at Baltimore Washington Medical Center.