DC Vanner and his superior DS Hawthorn were assigned to investigating the murder of Tina McIntyre in 2014. When Tina was violently assaulted at the Builder's Yard in Victoria Street, Vanner and Hawthorn were assigned to the case. They turned up at 19a Rosamund Street and arrested Carla Barlow on suspicion of attacking Tina, as she was seen storming out of the Rovers threatening to "kill" Tina after discovering she had an affair with her husband Peter. After questioning at Weatherfield Police Station, Carla was released pending further inquiries. Her brother Rob Donovan stated they'd arrested the wrong person, and that Peter was their prime suspect. They later called at the Rovers and interviewed Liz and Steve McDonald. Steve was forced to admit that he had known about Peter's affair with T