The state Department of Public Safety on Monday released three new videos of state troopers, this time of officers striking people who were in vehicles they stopped in 2006.

Monday’s videos are the latest in a string of Highway Patrol videos depicting misconduct that started almost a month ago with the captured voice of a white trooper issuing a racial slur and threatening a black man he was chasing in a 2004 traffic stop.

After watching that video, Gov. Mark Sanford withdrew the nomination of Schweitzer the next day for a second term. Sanford also accepted the resignation of Col. Russell Roark, the Patrol’s commander. Sanford said the trooper, who was issued a reprimand, should have been fired.

Other videos followed, including two in which troopers struck fleeing motorists on foot with their Patrol cars. The U.S. Justice Department subsequently opened a civil rights investigation, to be assisted by the State Law Enforcement Division.

The state’s Senate also has promised an investigation, to be triggered when Sanford produces his next nominee to head DPS. Sen. Robert Ford of Charleston, a member of the Senate Judiciary Committee, said last week as many as 40 videos show trooper misconduct.

Monday’s videos concern the conduct of three white troopers, though a black corporal was standing at the scene of one of the incidents and intervened to stop a trooper striking a black motorist in the back, according to records and a spokesman for the agency.