I think they confessed once brought in.
That's what I read. But that happened a day after he was interviewed by police. Plus, even though they have their confessions, they still need witnesses or a good defense attorney will rip the case apart. Being in the vehicle with them, Joseph will be a key to the case against them.
As long as he handles it right, being a witness should work in his favor. Even without that, though, I think we can get caught up in the fact that he was there and assume that he did something wrong, other than get into an altercation with the person who got shot.
This is what Joseph's attorney said:
"Kelvin Joseph did not shoot Cameron Ray. Mr. Ray’s death is a tragedy, and Kelvin extends his deepest condolences for the family’s loss. On the night of March 17,
Kelvin was unarmed and was not looking for violence. He found himself in a situation that escalated without his knowledge or consent. Along with condolences to the Ray family, Kelvin apologizes to the Dallas community for being anywhere near this type of incident. The investigation is ongoing, and we intend to respect the process.”
He's an attorney, so he could be lying, or that could simply be what happened. I don't understand why some just want to assume the worst. Even the police say that they believe Joseph was not the shooter.