I can only assume he was in "protective custody," where other inmates couldn't reach him. If he were in my jail, he would have been.
Suicide? I don't know. In my time at the jail, there was only one "successful" suicide by hanging. And that really wasn't a suicide, but an autoerotic asphyxiation gone wrong. We called it suicide, because we figured the family would like that answer better, and because it's still technically a suicide.
Onward and upward,
airforce