In February 2015, Katie dies after finally discovering that Robert had been having an affair with a man, Aaron Livesy (Danny Miller). Robert does not want Chrissie to find out so he pushes Katie and she falls through rotting floorboards, breaking her neck and killing her. Andy is devastated by Katie's death and begins to spiral in to depression and tries to commit suicide. Robert comforts Andy and lets him move into Home Farm. While trying to move on from Katie, Andy begins a sexual relationship with Tracy Shankley (Amy Walsh), and also makes a move on ex-girlfriend, Bernice. He later ends his relationship with Tracey after realizing that the relationship isn't right, and eventually gets back on the straight and narrow. A few months later, Andy discovers one of Katie's phone bills. He checks it and realizes that the last number to call Katie was Aaron. He confronts Aaron and he finally admits that he has been having an affair with Robert and that Robert murdered Katie. Andy is furious and tries to convince everyone that Robert murdered her. Nobody believes Andy, and everyone believes that he is having a breakdown. He also phones the police but Robert denies everything and is released. Andy goes up to Butler's Farm to get hold of a gun. When he cannot find a gun he is angry. While trying to find the gun, Ross Barton (Michael Parr) walks in and asks Andy what is wrong. Andy admits that he is looking for a gun to go and shoot Robert as he murdered Katie. Ross reveals that he was also going to shoot his own brother Pete Barton (Anthony Quinlan) as he had left him for dead following a fight over Ross' affair with Debbie. Andy and Ross eventually go to Ross' house where they agree to shoot each other's brother therefore giving them an alibi with no evidence that either of them was involved in either of the shootings. Later that night, Ross shoots Robert on Andy's behalf, although he survives and Andy backs out of the plan to kill Pete.