Police have released video showing how they recorded the aftermath of a drugs raid on a Portsmouth home.
The six-minute film - from which we have compiled a selection of clips - gives an insight into how police painstakingly build evidence at a crime scene.
The footage was used in the prosecution of Samuel McNamee.
He was part of a ring supplying high-grade cocaine
Minutes after the raid on his Paulsgrove home, a police officer conducted a walking tour of the home.
The officer films in each room and in the garden.