Jack followed Peter and Jennifer to Paris, still trying to prove that Peter was dirty. He found some books that could work as proof, but then Peter blew up the tunnels, and Jack and Jennifer barely escaped. Then Jack found Daniel Scott, the man Peter had hired to romance Laura. When Jack agreed to pay his debts (after luring him into a high-stakes poker game), Daniel confessed his dealings with Peter to Jennifer. She wouldn't believe his word alone, but Laura backed her up. After returning to Salem, Peter paid Daniel to tell Jennifer that Jack had bribed him to tell her those lies. Unluckily for Peter, Jennifer went to Daniel on her own, and tricked him into telling her everything. Jack had been planning to leave town until he learned that Jennifer kicked Peter out, and hung around to protect his ex-wife and daughter. He found out Peter was planning to kidnap Jennifer and Abby, but the police couldn't do anything. Jack headed over to the house with a gun, and accidentally killed Peter in a struggle. He was arrested for his murder, and bailed out by Jennifer. Too bad for Jack, Stefano had blackmailed a judge, and Jack was sentenced to life. His cellmate in prison was 'Travis Malloy', a plant from Stefano DiMera. When 'Travis' was released, he moved in next door to Jennifer, as Trent Davis.