Doon was born to a small family in Glasgow Scotland, and it didn't take him long to sign up for Strathclyde Police. When he was 18 he joined up immediately, and found himself quickly thrown into a high profile case on a well known criminal organization.
After things went south, his only choice in reality was to emigrate - and San Fierro made the most sense.
He spent his first few years working towards his citizenship, and when he got this at 24 - he applied for the San Fierro Police Department. Finding it hard to break through the ranking structure there, he quickly moved to Los Santos - applying for the Los Santos Police Department.
Doon quickly began to show his investigative side, applying himself to any and all calls or case, and receiving recognition from Captain Don Chester after not too long. After promotion to Police Officer II he applied for the Fast Track Program with the aim of becoming a Gang Detective.
After some time tensions rose within the LSPD and Doon found himself at a cross-roads in his career. He decided to go on holiday for four months - honourably resigning from his position after a spat with LSPD brass.
Doon returned to Los Santos in June 2023 - his sights set on a return to Law Enforcement - quickly meeting with James Kapow upon the founding of the BCSO. He returned at his same rank taking up the position of Deputy Lieutenant.