Unraveling Patterson's Motive: A Tale of Love and Betrayal

You two aren't going anywhere!"
It was David Patterson.
"Hand over the disc!" he demanded, pointing a gun directly at them. Andy, with sleight of hand, pressed the recording app on his phone.
"You won't get away with this Mr. Patterson. I was on to you from the start!" Andy responded with confidence. LJ was shaking in his boots.
"That's what I thought, you were getting too close,” David said.
"Why did you do it Mr. Patterson?" Andy asked.
"You wouldn't understand. I loved that woman. All she wanted to do was party and hang out with her friends. I tried to talk to her, but she wouldn't listen to me. She would often leave the house and not return until the next day. I tried waiting on her, hoping

she would change, but it got worse. I found letters, texts and email from some punk kid she met online. I found out they were meeting each other at night, when she would tell me she was going out with her friends. I couldn't take it anymore; I snapped and grabbed a knife out of the kitchen and followed her downtown to where they would meet. I caught her in the alley, where she called out his name, but she saw me, she was so pitiful with her crocodile tears and apologies. I was in an angry and jealous rage, so I killed her. I ran off. Then the kid got blamed for the murder,” David ended with tears in his eyes.
"But you cleared yourself by paying off the police and DA,” Andy responded.
"Everything went well until today. Hand over the disc,” he demanded. Just then the door opened hitting David and knocking him unconscious.
"Billy!" LJ said, surprised. But Billy was not alone. The police came with him and they arrested David Patterson.
"How did you know, Billy?" Andy questioned.
"I saw someone suspicious following you two in a BMW. I got worried so I called the cops." Billy said.
"Billy, you are my hero!" LJ smiled.