DI Kelly is a police detective at Walford Police Station. In 2007, he investigates the death of Pauline Fowler and subsequently arrests Sonia Fowler for her murder following the funeral. He arrests May Wright for abducting Summer Swann, and also Phil Mitchell on suspicion of murdering his fiancée Stella Crawford . He appears when he is investigating Jay Brown's stabbing. In August 2008 he investigates the murder of Jase Dyer and interrogates Billy Mitchell as a key witness. In July 2010 he informs Liz Turner that a body found in Albert Square is that of her son Owen Turner, and takes his ex-wife Denise Johnson in for questioning. Denise is released without charge. Kelly later informs Denise's family that her car has been discovered abandoned by a canal, and then that the body of a woman was pulled from the canal along with Denise's mobile phone. Lucas identifies the body as Denise's, however, Kelly still believes somebody else was involved in Owen's murder.