On 7 October 1992, Nikki Allan, a seven-year-old English girl, was murdered by David Boyd who "beat her about the head with a brick" shattering her skull and stabbed her multiple times, inside the derelict Old Exchange Building in Sunderland, Tyne and Wear, England. The following day, Allan's body was found in the basement room. George Heron was acquitted of the murder in 1993. Boyd was found guilty of Allan's murder in 2023 and was sentenced to life imprisonment with a minimum term of 29 years.

On January 26, 2017, Alianna DeFreeze, a fourteen-year-old girl from Cleveland, Ohio, was kidnapped, raped, tortured, and murdered by Christopher Whitaker.

Tammy Jo Alexander was an American teenage girl who was found murdered in the village of Caledonia, New York on November 10, 1979. She had been fatally shot twice and left in a field just off U.S. Route 20 near the Genesee River after running away from her home in Brooksville, Florida, earlier that year. For more than three decades, she remained unidentified under the names Caledonia Jane Doe or Cali Doe until January 26, 2015, when police in Livingston County, New York, announced her identity 35 years after her death.

Miriam García Iborra, Antonia Gómez Rodríguez and Desirée Hernández Folch, known as the Alcàsser Girls were three teenage girls from Alcàsser, Valencia, Spain, who were kidnapped, raped, tortured and murdered after hitchhiking to visit a nightclub in the nearby town of Picassent on 13 November 1992. The case became notorious in Spain because of the brutality of the crimes, the highly-criticised police investigation and the resulting media coverage.

The autopsies revealed the existence of seven hairs with seven distinct DNA profiles, none of them belonging to any of the girls or either of their alleged murderers, Antonio Anglés and Miguel Ricart. Of the two, Ricart was the only one jailed; the whereabouts of Anglés, still among Interpol's most wanted criminals, remains unknown.

Rania Alayed was a 25-year-old mother-of-three murdered by her husband in June 2013, in Salford, Greater Manchester, England, in an act of uxoricide. Greater Manchester Police Chief Detective Inspector Bill Reade described this as an honour killing, and the prosecutors stated she was murdered for trying to achieve independence from her husband and undergoing westernisation. Alayed's remains have never been found.  

Shafilea Iftikhar Ahmed was a British-Pakistani girl who was murdered by her parents in a suspected honour killing at the age of 17, due to their belief that she had become too Westernised.

Ahmed parents were each subsequently imprisoned for a minimum of 25 years for her murder in August 2012. The possibility of other individuals having helped her parents to dispose of their daughter's body has been raised; after the parents' trial, the chief executive of the Bradford Council for Mosques encouraged anybody with information about the case to come forward with information to assist police.

On Saturday, 1 September 1934, the badly burnt body of a woman with a bullet through the neck was found in a culvert running under Howlong Road in Albury, New South Wales, Australia. The body of the woman became posthumously known as Pyjama Girl.

The body remained unidentified for a decade until an Italian-Australian man, Tony Agostini, confessed to killing his wife, Florence Linda Agostini, a woman who had been missing since late August 1934. Police said they had matched the dental records from the body with Linda Agostini's, though Linda Agostini was ruled out as the victim in the initial investigation. Tony Agostini was arrested and charged with murder. He was then brought to trial and convicted of the lesser offense of manslaughter, and was sentenced to 6 years in prison. He was paroled after 3 years and 1 month and was deported to Italy.

Decades later, doubt was cast upon the conclusion that Pyjama Girl was actually Linda Agostini due to inconsistencies between the body of Pyjama Girl and Linda Agostini.

Fanny Adams was an eight-year-old English girl who was murdered by solicitor's clerk Frederick Baker in Alton, Hampshire, in 1867. The murder itself was extraordinarily brutal and caused a national outcry in the United Kingdom. Fanny was abducted by Baker and taken into a hop garden near her home, where she was brutally murdered and dismembered; some parts were never found. Further investigations suggested that two small knives were used for the murder, but it was later ruled they would have been insufficient to carry out the crime and that another weapon must have been used.