Officer McAlister was a guard at Highfield Prison and was on duty when inmate John Stape and his fiancée Fiz Brown were due to be married. After making a phone call to his mother on the morning of the wedding, John asked him for any words of wisdom. Advising him not to end up back inside, McAllister then led Stape into the prison chapel for the ceremony. McAlister returned to the chapel with the wedding party and as John and Fiz were duly married, he offered to take pictures for the happy couple.