You will need to obtain an (expensive) expert to testify that the piercings were improperly done and caused the keloids

If he was prosecuted and won, then he cannot be put into double jeopardy

It is the trial testimony that matters, not what was said in a deposition

I give up. . Perhaps your attorney could tell you

His estate would have been prorated and disperse by this time

You are not an attorney so you shouldn't advise him. He should consult directly

A public defender is appointed for charges in the state where the charges are pending

You can consider either going to the Dean of Students or the police

Consider contacting the Innocence Project

How would we know if a particular employer would want to hire you under that circumstance?