
Continuity mistake: When the investigator begins confessing to the other police officers, one of them has him eat a handful of salt. After eating the salt, tiny salt grains can be seen on his lip, and can be seen on his lip for the following minute whilst he is trying to convince them he was the killer. When he says "But I left fingerprints all over her apartment", a larger amount of salt can be seen on his upper chin that wasn't there a minute earlier. (01:45:52 - 01:46:57)