Oh yeah? Did you read the reports? Is that what it said? The judge RULED that is what happened? Or did they just drop charges for lack of evidence? You are assuming even more than I am. Even if he bashed his head into a wall I think they people that restrained him and then left him unsupervised should be liable.
The DA’s office eventually dropped the charges for the remaining officers, after the Judge hearing the case found the first four officers “not guilty.” After four losses, the DA’s office finally woke up and realized they couldn’t prove their case against the remaining officers. They cut their losses while they could. Why embarrass yourself anymore than you already have?