Audio problem: Near the end of the movie when the parrot is going to light the firecrackers, he is talking perfectly even though he has a match in his mouth. (01:30:35)
Audio problem: When Unger shoots his pistol into the sewerpipe in the basement, his gun has a silencer but the gunshot you hear is not silenced.
Audio problem: When the police are called for the first time, two officers burst into the house and are confronted by a dog. The alarm strangely stops three seconds after bursting in. (00:23:50)
Audio problem: When Mr. Unger is being led away after his arrest, watch - he's looking at the policeman holding his arm, talking and making gestures with his hands...yet there's no sound that goes with it.
Answer: It was Jernigan who thought there was a woman in the shower and he couldn't take the risk that if it was a woman, that she would eventually get out and see intruders in the house and call for the police. The only option open to Jernigan would be to kill her so there'd be no witnesses.
No it was Beaupre who thought there was a woman in the house.
I've seen the movie and I can confirm that it was Jernigan who opened the shower curtain because he thought a woman was in the shower.