Agent Sutton was present at Leicester Square following the fatal shooting of Rupert Thorne by Max Schenkel. He and Agent Manville questioned Harriet Baumann about Schenkel's identity and how long she had known CIA officer Jack Ryan Harriet told them that he was a professional German assassin and claimed that she had known Ryan for three and a half years and had worked with him on several interagency operations. This conflicted with the account Ryan had told MI5 Agent Jeremy Bright where he truthfully stated that he met her only a week before. Sutton then took Harriet to a car and escorted her to her hotel to collect her belongings in order to ship her back to Germany. Unfortunately, after Sutton and Harriet had taken the hotel elevator to Harriet's floor, they were met by Schenkel who shot Sutton in the head, killing him.