The Iceman: Episode 318

Harry was found downstairs in the utility room. He had been shot once, through the back, piercing his heart and killing him almost instantly. Nicola was upstairs in the main bedroom. She had been shot 4 times, three times down stairs, and a further shot as she had made her way into the bedroom, presumably to escape. The killer had placed the duvet over her head before carrying out the final fatal shot.

Just who had killed this young couple in their own home in East Sussex?