The Limbic Region (1996)

In San Francisco in the 1970s, a serial killer calling himself The Scorekeeper sends taunting notes to the police and media after each of his kills. Although the case is long closed, obsessed detective Jon Lucca (Edward James Olmos) still suspects the wrong man was named as the killer. Learning he has only weeks to live, Lucca meets with Lloyd Ward (George Dzundza) -- the man he has long been convinced is the murderer, but never had enough evidence to arrest -- intending to force a confession.