After the entire mess with Thomas Geiger, the corruption, and the fight to get his name cleared, he had decided to retire from being a detective inspector. His drive for justice had been nearly destroyed, along with his willingness to stay in a job where he no longer felt welcome. So he had finished out the last of the cases he shared with Sarah. Once everything is done and the paperwork is filed, he leaves, heading to Scotland and the home he left behind when he joined the London police force.