Michael Jackson Terry George Investigation whats' the point?

Im a Michael Jackson fan and I don't' believe he molested any Children but I read on sky news that the FBI are doing a Investigation into the alleged abuse of this man called Terry George who use to be friends with Michael but fell out when Michael got ually improper over the phone with him not my words. But my point and rant is what exactly is the point of the FBI Investigating this claim when Michael is dead and also why cant' people just leave Michael alone it was proven he did nothing wrong and he was found not guilty by a court of law. Its' really disrespectful and just another way for the media to talk badly about Michael.I think its' over the top to be honest the FBI Investigating this claim ! I mean Michael wasn't' Hitler for crying out loud !