New bodycam footage shared exclusively with the Liverpool ECHO shows the moment Elias Morgan was arrested by police for the murder of Lenny Scott.
The 35-year-old from Edge Hill, Liverpool , was convicted earlier this week at Preston Crown Court for the killing of the dad-of-three.
Morgan was sentenced to a minimum of 45 years in prison.
During a trial , the court heard how Morgan murdered Mr Scott in a "revenge attack" after the then Altcourse prison officer exposed an illicit relationship between him and a female prison guard.
Mr Scott, of Prescot, was said to have refused a bribe of £1,500 in return for not reporting a phone which Morgan illegally held behind bars and contained evidence of the affair.
Morgan later warned Mr Scott "I'll bide my time, but I promise