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.

Friends and family of Leanne Meecham discuss her fatal relationship with her stepfather.

The mother and sister of Kirsty Grabham open up about her shocking murder, which took place in Swansea in 2009. The 24-year-old's body was found dumped in a suitcase by a motorway.

The story of convicted rapist David Jaggers, whose sister had his baby when she was 12 years old and kept its father's identity secret for 18 years. By this time, her brother had killed his girlfriend and served six years for manslaughter. He went on to serve life for rape and kidnap. In the first of this series about heinous crimes, his relatives open up about their heartbreak.

The parents of Carly Fairhurst offer an insight into domestic abuse, speaking about their daughter's death after she had a fight with her boyfriend in 2006.

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 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.

Account of an A&E nurse who was killed by her ex-boyfriend outside her workplace while he was on bail and awaiting trial for raping her in 2010. The programme explains how the case led to changes in the law to help safeguard victims of crime, and features extracts from her diary in which she had predicted her death a few weeks prior to her murder.

Two sisters from Port Talbot, Wales, share the chilling story of sexual abuse committed by their father, who molested them for 12 years.