I, Sniper: The Washington Killers | Preview (Channel 4)

This six-part crime serial gives a minute-by-minute account of the 2002 Washington, D.C. sniper case - one of the most terrifying crimes in recent history.

Lee Malvo, the surviving shooter, is heard in a series of phone calls from his Supermax cell at Red Onion State Prison in Virginia, where he is in solitary confinement.

Featuring a wealth of testimony from victims, survivors, families and investigators, the series tells how a chance meeting between a vulnerable Jamaican teenager and a disaffected Army veteran set in motion a murderous road trip and how a chain of events led them to commit unthinkable acts of violence.

Told from many angles, this definitive account of a shocking American crime story examines how Malvo came to be a mass murderer at the age of just 17.

In episode one, we are introduced to Lee Malvo at age 16, when he took the life of young mother Keenya Cook. It's February 2002 in Tacoma, Washington. She is Malvo's first murder victim, shot point blank by Malvo as a rite of passage, signalling the beginning of a devastating process of transformation and indoctrination which led Lee Malvo and John Muhammad along the path of homicidal violence.

All six episodes will be available to stream or download for free on All 4 from 24 January at midnight, before the transmission of this episode.