Sky Crime has been a huge hit with true crime fans since its launch earlier this year, broadcasting a number of intriguing and often tragic documentaries, and its latest offering - centring on the little-known serial killer Israel Keyes - is no different.
The two-hour-long Method of a Serial Killer looks at Keyes, who carefully planned out his killings over a 14-year period before being apprehended by cops in 2012.
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A one-off documentary, it features interviews with those closely involved with the case - including FBI agents, journalists and the families of victims - as well as chilling interview footage with Keyes in which he laughs and tries to joke with police.
The killer, who lived with his long-term partner and little girl, was able to evade police by travelling up and down the country, targeting both males and females, with no distinct 'pattern'.
Keyes also stashed away 'kill kits' across the US, containing items to carry out a killing and dispose of a body, including guns, rope, shovels, guns and duct tape - sometimes these kits would lie in the ground for years.
FBI Special Agent Bobby Chacon tells the documentary-makers: "Israel Keyes was one of the most meticulous serial killers that I've ever come across."
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Keyes was eventually caught after he kidnapped and killed 18-year-old coffee shop worker Samantha Koenig in Alaska.
Unlike his other killings, Keyes got in touch with her family to demand a ransom - despite the fact he had already killed her.
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Disturbingly, Keyes posed Koenig's corpse as if she was still alive, braiding her hair and making it look as though she was holding a current newspaper. He took photographs and used these to demand a $30,000 random for her safe return.
The money was paid into Koenig's account, for which Keyes had the card. This proved to be his downfall, as police were able to trace him by seeing where the card had been used.
He was eventually caught by Texas Highway Patrol, arrested and extradited back to Alaska.
While under arrest, Keyes confessed to four more killings and has since been linked to 11.
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However, Keyes would never face justice - he killed himself at the Anchorage Correctional Complex where he was being held on suspicion of murder on 2 December 2012.
Method of a Serial Killer airs on Sky Crime on 7 December and is available to watch on NowTV right now.
Topics: TV and Film, crime, US