The search is off for a second suspect in the wake of Saturday’s shooting in Tucson, the Pima County’s sheriff told reporters on Sunday. Officials in Arizona found and interviewed the man in question, who had been spotted at the scene with the alleged shooter, Jared Lee Loughner, and determined that he was not involved. The man, they say, was a cab driver who drove Loughner to the location. The two had gone into the Safeway supermarket where the shooting occurred together so that Loughner could make change to pay his fare. Earlier police had released an image of the man obtained from a security video.