A jury on Friday found Tennessee cornerback Marsalous Johnson not guilty of assault, after an off-duty sheriff's deputy said Johnson waved a gun at him while driving on the interstate. When the deputy alerted on-duty officers and they pulled over Johnson's vehicle, they found a toy Uzi submachine gun under the passenger seat. Johnson's case was postponed several times since the incident last July and finally went to trial in Putnam County Circuit Court. A jury found Johnson not guilty of simple assault, court clerk Marcia Borys said.