"Confessions of a Dangerous Mind"I recall recently watching a movie about Chuck...don't know whether he wrote it or not, but he was portrayed as a mentally troubled psychotic. I believe that he "outsmarted" his girlfriend, played by Julia Roberts, by switching the poison meant for him, killing her. I think that Drew Barrymore was also in it....Not too bad, worth two hours if there's not much more to do.
This is it:
https://www.imdb.com/title/tt0270288/
Arnaldo