Catrine da Costa (19 June 1956 – c. July 1984) is a Swedish murder victim whose remains were found in Solna, north of Stockholm, in 1984.

Da Costa, a homeless, divorced mother of two, heroin addict and prostitute in Stockholm in early 1984,[1][2][3] disappeared during Pentecost on 10 June, or soon thereafter.

[4] The last alleged sighting of Da Costa took place at Gamla Brogatan in central Stockholm on June 15th, she was in the company of a middle-aged man about 6 ft.

[2] Initially the murder did not receive much attention from the police due to the large number of violent crimes in Sweden at the time.

[2] Härm had also recently been working in a team looking into unsolved murders of prostitutes in Stockholm together with forensic pathologist Jovan Rajs and three police officers including Jan Olsson who was seen as Sweden's "Super Cop" at the time.

[16] In 1986, police resources were stretched thin after the murder of Swedish Prime Minister Olof Palme, so the dismemberment case was shelved until the following year.

[21] The first trial ended in a mistrial after the lay judges were interviewed for the newspaper Aftonbladet on 9 March 1988 and commented on the court's justification for its judicial decision.

[22] In a second trial, the lower court asked the Swedish National Board of Health and Welfare to investigate the circumstances of the case[1] and found that da Costa's cause of death was unknown.

Although in its verdict the court found that the defendants had in fact dismembered the victim's body,[22] the statute of limitations for that crime had expired.

[23] On 23 May 1989, the Swedish authority for medical-negligence assessment rescinded the doctors' right to work, and its ruling was upheld in a 1991 appeal.

In 2003 journalist Lars Borgnäs published Sanningen är en sällsynt gäst ('Truth is a Rare Guest'), opposing Lindeberg's position and theorizing that da Costa was murdered by a serial killer.