Hennepin County attorney drops murder charges against State Patrol trooper in shooting death of Ricky Cobb II St. Paul Pioneer PressCharges dropped against state trooper Ryan Londregan in the shooting death of Ricky Cobb II MPR NewsHennepin County Attorney Mary Moriarty announces dismissal of case against Trooper Ryan Londregan KSTPMurder charges dropped against Minnesota state trooper Ryan Londregan in killing of Ricky Cobb II CBS News