It happens during a moment that’s not filmed at all; the only indication that a dead dog has been found is when the detectives find a pile of leaves, the camera doesn’t show any dead dog, but focuses on a detective’s face who says something like “he skinned that dog!”
The main male character gets offended from being asked what he's doing shopping in an feminine clothing store and says, "I'm not a pervert, I'm shopping for my girlfriend".