Philip Glenister delves into the mindset of a murderer and explores their actions, starting with the disappearance of children's author Helen Bailey.

From gang shootings and drug busts to high-speed car chases and bar fights, this documentary series follows the tireless work of the US police force.

The team race to respond when shots are fired in Texas. A no-holds-barred look at the US police force in action.

From gang shootings and drug busts to high-speed car chases and bar fights, this documentary series follows the tireless work of the US police force.

A pulse-pounding search for a killer begins when a man's missing car turns up with his estranged wife's body inside.

A look at the horrific crimes of Angus Sinclair, who murdered two teenage girls in Edinburgh in October 1977. Dermot Murnaghan presents.

Series revealing the dark side of suburbia, starting with the 1998 murder of Patricia and William Wycherley. Presented by Phil Davis.

A closer look at the 1987 Hungerford massacre, in which 27-year-old unemployed labourer Michael Ryan fatally shot 16 people, before committing suicide.

True crime documentary series following determined investigators as they piece together events during the critical 24-hour window after a crime.

Dermot Murnaghan examines the crimes of former carpenter John Sweeney, who killed two girlfriends before dumping their remains in city canals.

The story of Steven Murphy, who was stabbed to death in his home in Norfolk in 2009 by a former friend. Presented by Phil Davis.

The story of the 22-year-old college dropout who shot dead six people and injured a Congresswoman in a murderous rampage in Tucson, Arizona, in 2011.