I can honestly say I don't believe he would be. From what I recall, he died of medical complications arising from too much plastic surgery. I don't think that would have changed if he had gone to prison. He was among the richest men on the face of the planet, if he couldn't find a cure for those complications from outside the prison system, I doubt he would have found one inside.
Also, I have no idea if he deserved to go to jail. Maybe he was a pedophile[footnote]I think this is likely, based on what little psychology I understand: he was beaten and forced to sing by his father from a very early age, which often results in a desire to get one's childhood back, often leading to sexual connotations during puberty[/footnote], but that doesn't instantly make him a child molester. Lots of people have pedophilic[footnote]A sexual attraction to pre-sexual humans[/footnote], hebephilic[footnote]A sexual attraction to humans entering pubescence[/footnote] and ephebephilic[footnote]A sexual attraction to post-pubescent humans[/footnote] tendencies[footnote]In fact, it has been argued that not being at least mildly ephebephilic is actually indicative of an unhealthy sexual psychology, as the post-pubescent years are the most fertile for females, resulting in a genetic predisposition to seek those forms.[/footnote], but obviously not all of them act on them; if they did, we would have far more accusations and convictions, even with the understanding that not all molestations would be reported.
Anyway, that's all aside and moot, because the man didn't get convicted and is now dead. Regardless of what I may think about his personal life, I believe his music was a fine contribution to the stage of pop and thus deserves recognition.
I apologize for the mess of footnotes, but I feel they're necessary. Not a lot of people know the difference between pedo-, hebe- and ephebephilia, unfortunately.