The end (spoiler)
Soooo does Parker go back to jail after this or what? Because that would probably be the funniest thing in the world. What a great movie.
shareThe deal was that so long as he catches SID, he is a free man.
While there was the whole thing where the Chief went in and trashed the control room where they were monitoring Barnes and were going to kill him through that cranial implant, in the end Barnes still lived up to his end of the bargain - SID was taken down.