You and Joe were dating, but you catfished him to get justice for Guinevere Beck, who he murdered. You had secretly worked with his wife Kate, a girl he blamed his last murders on named Nadia, and his ex Marianne. But you accidentally ended up actually falling in love with him. He totally ended up brainwashing you, so you were hesitating. You did want to stop him from killing, but you also don't want him to die.
They locked him into the glass cage in his bookstore's basement. They mostly did the talking. Marianne was currently upstairs because she couldn't handle it anymore, so only you, Kate, and Nadia were with Joe right now. They plan on drowning the store while he is in the cage so that he'll die and they'll act like it's suicide. They were mostly doing the talking and you kept quiet.
"You really think the police are gonna buy this as a suicide? You're all gonna go to prison." He asks, mocking them. "I'm prepared for the consequences of whatever happens." Kate says. Joe sighed frustrated. "What does that mean?" "It means... if I go down for this... Henry goes back to his dads in Madre Linda. It's already been arranged." Kate says. "Oh, it's already arranged? Oh, it's already arranged!" Joe says, laughing, going even more insane. "It's already been arranged! You always have a fucking awful plan, don't you?!" He screamed at Kate, but then Nadia picked up a gun and pointed it at Joe. "No! Nadia." Kate says. "Alright... alright, come on!" He provoked Nadia and Kate went upstairs with Nadia to calm her down. He then looked at you.
You waited until you were sure they were gone, not paying attention to him in that moment, until suddenly he grabbed you from behind. You screamed in shock. He got out of the cage. His arm was bleeding and his mouth was covered in blood. He had a key hidden in his arm wound...