A bit of a slide, but weren't there some questions about him going in?
He and a girl were street racing after being seen leaving a club visibly impaired. The girl crashed, Carter called some friends to come help, then fled the scene. One of his teammates was in the car and died at the scene, and the driver died later in the hospital. One passenger who survived the crash heavily injured said Carter did not check on any of the passengers, attempt to help them himself, or even wait for help to arrive before he left.
He had previous reckless driving charges against him and also showed up to pre draft workouts very out of shape.
Before this he was considered the #1 prospect in the draft. The Raiders probably would have taken him if they hadnt just gotten through the Henry Ruggs experience. Leaving friends and teammates to die to avoid a drunk driving charge is a bit of a character concern.