Other mistake: Fraker's footprints are right next to each other in Kersey's bedroom. The right footprints even with the left footprints. The only way for this to be possible is if he had hopped around the room rather than walking.
Death Wish 3 (1985)
1 other mistake
Directed by: Michael Winner
Starring: Charles Bronson, Martin Balsam, Ed Lauter, Deborah Raffin
Revealing mistake: When Bronson is chased up onto the rooftop by one of the gang members, Bronson pushes the guys over the edge of the building, and it is visible that it is a dummy taking the fall.
Paul Kersey: My friend Wildey's coming.
Trivia: The bad guy, Fraker, real name Gavan O'Herlihy, is the lost son "Chuck Cunningham" on the first season of Happy Days in 1974.