John Ingvar Lövgren (22 October 1930 – 9 February 2002) was a Swedish serial killer and rapist who confessed to four murders committed between 1958 and 1963 in the Stockholm region. Lövgren was convicted and sentenced to closed psychiatric treatment at Salberga prison. He went under the name Flickmördaren ("The Girl Killer"), due to the fact that his last two victims were young girls. He was, at the time of his death in 2002, no longer in treatment due to poor health, which he had received from his cancer. He was buried at Sala cemetery.
Agneta Nyholm, 26. - murdered on the night of 27 June 1957 at her home in Fruängen. (Lövgren was never convicted of her murder and her case has since been closed and prescribated. Police however considers it solved and Lövgren as the assailant).
Greta Löfgren, 62. - raped and murdered in November 1962 in her home at Kungsholmen.