Callum Stone/Service Record

2007: Sergeant Stone arrived at Sun Hill, heroically rescuing a girl from a drunk armed with a cricket bat in custody.

2008: Stone told a suspect who grassed him up so he would be beaten up by thugs, because he got off on raping a teenager.

2008: Blames himself when Emma Keane is killed

2008: Dives into River Thames to rescue a manic depressive from a car

2008: Covers up a drink drive crash involving Sally Armstrong

2008: Assaults a suspect

2009: Covers up an assault Sergeant Dale Smith gave to a suspect

2010: Assaulted defending a woman, but then does the same to the suspect when they have no evidence

2010: Suspended for assault

2010: Held at gunpoint by murder suspect