Question: Why didn't the police come looking for Allie in Graham's apartment? Some detectives should've been looking for her since Sam died early that morning.
Question: What exactly was wrong with Hedy? What made her so messed up?
Answer: Hedy's twin sister drowned when she was a child. She's trying to reform that bond with Allie.
Answer: Because his body hadn't been found yet, It was still early in the morning.
Of course, his body had been found - it was all over the news.