Derek Hale (Teen Wolf) is not an ex-felon!
Nothing irritates me more than seeing him described as a felon or ex-felon in fanfiction. A felon is someone who has been found guilty of committing a felony. Derek was arrested, yes. But the charges were dropped. He never had his day in court. He was not found guilty by a jury of his peers.
Therefore, he is not a felon. He is an innocent citizen with no criminal record whatsoever. (As far as we know.)
That is all.