At the end of series one, John is promoted to acting detective chief inspector. He is relieved of the position when Scott Vaughan (Oliver Milburn) is hired, which John is pleased about as he dislikes the paperwork.
Following the completion of series one, John was appointed acting detective chief inspector. However, his tenure in this position came to an end when Scott Vaughan (Oliver Milburn) joined the team, a development that pleased John since he had grown tired of the administrative tasks.