Rainie begins blackmailing Ian, threatening to reveal his infidelity to Denise in order to fund her drug habit. When Ian stops paying her, she reveals what happened to Patrick Trueman, Denise's father figure. Patrick tries to tell Denise but suffers a stroke before he can. Various suspects, including Max, Jake Stone, and Billy Mitchell, are questioned by the police, but they are all proved innocent. DI Keeble takes over the case, and encourages a press appeal, at which they ask for a man in a beanie hat to come forward as he was on the bus with Lucy on the night she died. Ian makes an impact statement, but afterwards is interrogated by press as to Lucy's drug habit. Phil realises that Keeble did not stop the interrogation as she knows Ian is hiding something, and Ian confesses the truth about Rainie to Phil. Mick Carter helps Ian through his issues, but sees Ian and Rainie together. While speaking with Rainie, he is arrested for kerb crawling, but Ian convinces him to keep quiet and plead guilty to protect his fake alibi. Rainie tells Denise the truth, and she leaves him, while Cindy returns to Walford and gives birth to a daughter, Beth. Peter proposes to Lauren Branning, who has become his girlfriend after supporting him through his grief for Lucy, after holidaying in New Zealand with Steven, but she rejects him when she discovers he was Lucy's cocaine dealer. Ian disowns Peter but later makes amends with him with the help of Jane, who returns with Bobby. Martin's wife Sonia, who has been visiting her mother Carol Jackson to help her with her breast cancer, reestablishes herself in Walford and begins running a 'Fat Blasters' club to helping women lose weight. She feels insecure in her marriage and Martin pays little attention to her. She collapses after a dodgy gastric band implant in Bulgaria, and Martin returns to find her being rushed to hospital. Meanwhile, Bianca finally decides to leave Walford for a fresh start in Milton Keynes with Tiffany, Morgan and her boyfriend Terry Spraggan. Since then, Liam has assisted Cindy in raising Beth. In 2015, Lucy's murder storyline reaches a climax, leaving several characters as potential culprits. During the final scene of the flashback episode which aired on 19 February 2015 to mark "EastEnders" thirtieth anniversary, it was revealed that Bobby had accidentally killed his sister when he threw her jewellery box at her head, upset at the constant rows she caused.