Linda Mulhall was born in 1975 in Dublin, Ireland, into a troubled family environment. She was one of six children raised in a working-class area of Tallaght. Linda left school early and had four children. She struggled with substance abuse, including heroin addiction, and had a history of minor criminal offenses. Her personal life was marked by instability, including relationships with abusive partners. One such partner, Wayne Kinsella, was convicted of child cruelty and sentenced to seven years in prison for abusing Linda's children. ​

On March 20, 2005, Linda and her sister Charlotte, along with their mother Kathleen Mulhall, spent the day drinking heavily with Kathleen's boyfriend, Farah Swaleh Noor, at Kathleen's flat in Richmond Cottages, Summerhill, Dublin. The group consumed alcohol and took ecstasy tablets. An argument erupted when Noor made unwanted sexual advances toward Linda. Kathleen allegedly incited her daughters to kill Noor. In the ensuing altercation, Charlotte stabbed Noor with a Stanley knife, and Linda struck him multiple times on the head with a hammer, resulting in his death. ​

After the murder, the sisters dragged Noor's body into the bathroom, where they dismembered it using a kitchen knife and hammer. They severed his head and limbs, placed the body parts into plastic bags, and disposed of them in the Royal Canal over several trips. Noor's head was never recovered; Linda later admitted to transporting it by bus to Tallaght, where she buried it in a field. She subsequently retrieved the head, smashed it with a hammer, and reburied it in another location. ​

The crime came to light ten days later when a passerby spotted one of Noor's legs floating in the canal. The Gardaí launched an investigation, leading to the arrest of the Mulhall sisters and their mother in August 2005. Initially, all three denied involvement, but Linda eventually confessed. In October 2006, Charlotte was convicted of murder and received a life sentence, while Linda was convicted of manslaughter and sentenced to 15 years in prison. Their mother, Kathleen, fled to England but returned in 2008 and was later sentenced to five years for impeding the investigation. ​Linda served 12 years of her 15-year sentence and was released in 2018.