Clay Pigeons (1998)

Clay Pigeons
Crime, Comedy, Drama, Romance
Clay is a young man in a small town who witnesses his friend, Earl, kill himself because of the ongoing affair that Clay was having with the man's wife, Amanda. Feeling guilty, Clay now resists the widow when she presses him to continue with the affair. Clay unknowingly befriends a serial killer named Lester Long who murders the widow in an attempt to "help" his "fishing buddy."
Starring
Joaquin Phoenix, Vince Vaughn, Janeane Garofalo, Scott Wilson, Gregory Sporleder, Georgina Cates, Vince Vieluf, Joseph D. Reitman, Nicole Arlyn, Wayne Brennan
Directed By
David Dobkin