There are about 600 murders each year in the UK. So, what drives people to kill? Are some people born to kill or are they driven to it by circumstances? Michael Mosley delves into the BBC archives to chart scientists' progress as they probed the mind of the murderer to try to understand why people kill, and to find out whether by understanding murder we can prevent it.

The true-life story of a Harlem's notorious Nicky Barnes, a junkie turned multimillionaire drug-lord. Follow his life story from his rough childhood to the last days of his life.

Inspired by a book by acclaimed historian Simon Schama, Murder at Harvard uses a combination of film-noir drama and present-day documentary footage to tell the true tale of one of the most notorious American crimes of the 19th century. Grappling with frustrating gaps in the historical record, Schama assumes the role of a time-travelling detective who takes an unusual step for an historian and imagines how certain scenes and encounters might have played out. "Maybe I thought what I was after was not a literal documentary truth," Schama tells us, "but a poetic truth — an imaginative truth — and for that I was going to have to become my own Resurrection man. I was going to have to make these characters live again."

In 1967 Canadian filmmaker Hugh O'Connor came with a crew to eastern Kentucky to make a film showing people from all walks of life in the United States. They finished the day by filming coal miners and their families in rental houses. As the filmmakers were leaving, Hobart Ison, the owner of the property, drove up and fired three shots, killing Hugh O'Connor. Elizabeth Barrett, from Kentucky herself, explores why this happened by trying to understand the people and culture of eastern Kentucky.

The unsolved murders of Tupac Shakur and Christopher "Biggie Smalls" Wallace still stir the public's imagination after 20 years. Yet law enforcement has been at a standstill to produce results. The producers of "American Federale" and the first two "Assassination" films, finally unravel the tangled cases and expose not only who may have done it, but also why these cases have never seen justice. Battle For Compton" is the story of "The Machine"; a group of high powered individuals with a very dark secret they killed to keep, and have spent the last 20 years hiding- hoping one day it will all go away- before they do.

In 2001, Andrew Bagby, a medical resident, is murdered not long after breaking up with his girlfriend. Soon after, when she announces she's pregnant, one of Andrew's many close friends, Kurt Kuenne, begins this film, a gift to the child.

A young mother’s mysterious death and her son’s subsequent kidnapping blow open a decades-long mystery about the woman’s true identity, and the murderous federal fugitive at the center of it all.

ABC retells the dark, disturbing story of Manson — and his twisted cult of devoted followers he instructed to carry out a series of grisly homicides in 1969. In this two-hour documentary.

Hear from the prosecutors who handled Susan Smith's case and why authorities doubted her story from the beginning. The boys' father, David Smith, talks about why he believes 30 years in prison isn't long enough for Susan and what he's prepared to tell a SC Board of Pardons and Paroles to keep her behind bars.

"The Karma Killings," is a modern-day crime thriller mixed in with Indian mythology and class warfare. The documentary delves into India's most infamous serial killings and its impact on a nation. Told through the people directly involved, the film unravels the complexities of the case and goes beyond the sensational headlines to present a suspenseful and scary mystery. And has a huge twist - one of the killers maybe innocent?

The unsolved rape, mutilation and murder of young G.I. Darlene Krashoc has haunted Joe Kenda in the years since he turned in his gun and badge. Until a crack team of cold case cops uses Kenda’s groundwork to set a trap for a monster hiding in plain sight.

A documentary about the rival gangs Mara 18 and Mara Salvatrucha, originating in Los Angeles but terrorizing El Salvador. It explores their origins as possible founding myths of organized crime in a globalized world.