Documentary lifting the lid on shocking crimes. Family members talk about the murder of 12-year-old Tia Sharp by her step-grandfather Stuart Hazell in Croydon, south London, in August 2012.

Documentary exploring the house fire deliberately started by Carl Mills in Cwmbran, south Wales in 2012, in which he killed his baby daughter, his girlfriend and her mother.

The family of Kirsty Treloar speak about her shocking murder at the hands of Myles Williams in 2012, who also tried to kill her brother and sister when they attempted to defend her.

Documentary in which friends of Michaela Gol and her mother Julie Sahin reflect on their murders at the hands of Michaela's husband Ensar in 2011.

The story of a father who killed his seven-year-old son and 25-year-old daughter in Fife in 2008, including an interview with the victims' mother.

Josie Fleming describes how her 17-year-old sister Sylvia was murdered by her boyfriend Stephen Scott in Omagh, Northern Ireland, in April 1998.

The mother of 20-year-old Eddie Miller, who was murdered by his girlfriend Michelle Mills in Scalford, Leicestershire, in 2012, describes how his death has impacted on the family. Plus, forensic psychologist Keri Nixon and psychologist Emma Kenny investigate what factors may prompt women to commit murder.

The story of twins Rachel Steadwood and Tracy Brown, who were sexually abused by their uncle between the ages of five and 13. Despite the horrors they endured, both women kept quiet about their ordeal for nearly 30 years but broke their silence in 2012 and as a result, John McCallum was finally sent to prison for his crimes.

Chloe Gazzard discusses how her sister Hollie was stabbed to death by her ex-boyfriend at the salon where she worked in Gloucester.

Sarbjit Kaur Athwal tells the story of how her mother-in-law plotted the murder of her young sister-in-law.

Elisa Frank talks about how her former lover Ahmad Otak murdered her sister and best friend in Wakefield, West Yorkshire

Franky Fenton talks about how her paranoid schizophrenic son murdered his grandmother at her home in Leeds in May 2008.

Doctor Alison Hewitt discusses how her relationship with Al Amin Dhalla turned into a terrifying nightmare amid his web of lies and deceit.

A man reveals how his stepson's obsession with the TV series Dexter led him to kill his own mother in a brutal knife attack.

The case of Malcolm Webster, who killed his wife Claire in 1994, as told by his victim's brother and the murderer's second wife.

Gareth MacDonald's mother and father discuss how their son was brutally killed by his con-artist lover in September 2007.

The story of Surrey teenager Breck Bednar, who was lured to his death via an online gaming community. Computer engineer Lewis Daynes was setenced to a 25-year prison term for fatally stabbing Bednar in February 2014.

The case of Danai Muhammadi, who started a blaze that killed his estranged wife Melissa Crook, his father-in-law Mark Crook and his own baby in 2011.

The story of how Rana Farqui was stalked and murdered by her former partner in Buckinghamshire in 2003.

Louise Turnbull from Gateshead, talks about the abuse she suffered at the hands of her stepdad, Albert Maughan.

The tragic story of Ellie Butler, a six-year-old girl who was beaten to death by her father on 28 October, 2013, at his home in Sutton, London.

Series revealing some of Britain's most shocking and disturbing crimes. In this special episode, experts examine what drives some people to kill.

Family members question what drove 31-year-old Ross Taggart to murder his mother and dispose of her body under a caravan in Fife.

The case of Darren Sykes, who killed his sons, and himself, in an arson attack at his Yorkshire home in 2014.

Alissa Moore talks on TV for the first time about the abuse she suffered at the hands of her father in their family home.