Other mistake: The way 'Sara'/'Sarah' is spelled differs from the movie credits and the tag on the bottom of her roller skate shown near the end of the movie. (01:35:35 - 01:37:30)
Other mistake: This takes place during the scene when Chris, Sarah, and Brad are in the living room. Darryl shows up in one window and Brad quickly shuts the curtains on him. Within a few seconds Darryl shows up at the window at the other side of the room. The direction in which he appeared in the window signifies that he ran all the way around the house. I don't see how that could be done in a few seconds. (00:11:30)
Answer: He's on the lam after shooting at his wife's lover. He probably needs whatever cash he has on hand.
Brian Katcher