Theres a movie my Dad remembers seeing years ago. A cop gets framed, ends up in prison with a lot of the people he's put there. Word gets out that they're planning a riot to kill him, the prison's put on lockdown. Then suddenly all the small time gangsters, the bikers, dealers, whatever they all start dying. Pretty much everyone who's plotted against him. Ends up, its the mafia's men on the inside, since the cop at one point saved the mob leaders son. Anyone know the movie I'm talking about?