ScreenLog
John Patrick Mahon (February 2, 1938 - May 3, 2020) was an American film, stage and television actor. He was known for Armageddon (1998), L.A. Confidential (1997) and Zodiac (2007).
Filmography
Armageddon (1998)
as Karl
L.A. Confidential (1997)
as Police Chief
The American President (1995)
as Chairman of the Joint Chiefs