Natural Born Killers

Mickey (Woody Harrelson) and Mallory (Juliette Lewis) are still alive, having killed pretty much everyone in their path including Wayne Gale (Robert Downey Jr.).
Thanks, FXmellow7!

Heather E provided the following information on an alternate ending, found on the Director's Cut DVD: Owen (Arliss Howard) then kills Mickey and Mallory.

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