Daniel
Daniel didn't want to wait for the police to be bombarded by a dozen questions that he had no answers to. First, he had to get Cassie to safety, then he could entertain the detectives' inquiries. Someone was trying to kill him and he had to figure out who and why. His best guess was that it related to his net worth. He had no wife or kids to pass along his empire. That meant it could be someone in the family. His family was massive, with a long list of uncles, aunts, cousins and nieces and nephews he'd only heard about.
He was reminded about his mom's story of the deaf guy dying by falling in front of the subway train. Was there more to it than he'd thought? Had the assassin been after him and got confused? Maybe the guy looked like him, and had used sign language or something, and the killer had seen and assumed he was Daniel. Possible.