|Law & Order: Flight (1998) [Aaron Downing]: Commits suicide (off-screen) by hanging himself in a motel room. His body is shown afterwards when Benjamin Bratt, Angie Harmon, Jerry Orbach and Sam Waterston walk in and discover him. (Thanks to Neil)
Road to Perdition (2002) [Alexander Rance]: Accidentally shot by Jude Law when Jude fires several times at Tom Hanks and the shots hit Dylan through the wall of his hotel room. His body is shown afterwards when Tom runs through the bedroom.
Hide and Seek (2005) [Sheriff Hafferty]: Hit on the head with a shovel by Robert De Niro in the hallway; he dies shortly after Famke Janssen discovers him.
Fido (2006) [Bill Robinson]: Shot in the chest by Henry Czerny as Dylan tries to save his son (K'Sun Ray). (At Dylan's subsequent funeral, it's established that his body was decapitated to prevent his coming back as a zombie, per Dylan's own wishes.) (Thanks to Tommy and Arben)
Trick 'r Treat (2008) [Steven]: Throat torn open by the werewolf Anna Paquin. (Thanks to Tommy and Arben)