Wire and hooks like the ones used to bind the victim are found in one of Castle’s carrying bags. There’s also a shirt covered in blood that matches the victim’s. Beckett says, “The evidence isn’t the whole story. Castle taught me that.” Even Captain Gates has trouble believing Castle could be involved in such a heinous crime. Now that her colleagues know about her relationship with their prime suspect, Beckett lets Ryan and Esposito know that Castle wanted to be alone to write during the time of the murder. In other words, he has no alibi.
Alexis and Martha assure Beckett that no one else could have access to their apartment. Beckett assures Castle that she will get to the bottom of what’s happening. He knows this. Unfortunately, the evidence continues to mount. A deleted file from Castle’s computer shows an outline of a story. It’s all about a killer who stages a crime scene that’s so bizarre that the cops can’t see he’s hiding right under their noses. There are also dozens of emails suggesting Castle was having an affair with the victim.
Tears stream down Beckett’s face as she lays everything out to Lanie. She says, “I know him, Lanie. He is an immature, egotistical, self-centered jackass sometimes, but he’s not this.” As for Castle, he is visited by someone he knows all too well while in his holding cell. Serial killer Jerry Tyson, aka “3XK,” stands before him in a police uniform. All that’s happening right now is his doing. Tyson has people waiting to murder Castle when he’s moved to central booking. He’ll be killed in prison and there’s nothing Beckett can do to stop it. That’s how Tyson will get his revenge on the both of them.