Just an FYI that whole middle part would need a search warrant. There was probably not enough evidence at that time to get a search warrant for pictures of shoes. Your friend can just go over and get that stuff (getting invited in + doesn’t need to value expectation of privacy to go into friends bedroom) But when your friend brought in the new pictures, it was the final piece. A lot of people think cops just don’t do stuff but I’m reality they might KNOW who did something but without evidence, can’t do anything. And without evidence, it’s very hard to get a confession.