Silvo Plut (May 29, 1968 – April 28, 2007) was a Slovenian serial killer. He was sentenced to 30 years in prison for the murder of Ljubica Ulčar and the attempted murder of her husband Miro Ulčar on February 24, 2006. Plut had been released on probation after 13 years in prison for the 1990 rape and murder of a former schoolmate, Marjanca Matjašič. He committed suicide in his prison cell on April 28, 2007.
Plut killed his first victim, Marjanca Matjašič, on February 16, 1990 in Slovenia. He was sentenced to 15 years in prison. In 2003, he was released on parole.
He killed his second victim, 25-year-old Jasmina Đošić, on November 18, 2004 in Aleksinac, Serbia. He escaped to Slovenia, which refused extradition in spite of a warrant from Serbia.
He killed his third victim, Ljubica Ulčar, 25, on February 24, 2006, also wounding her husband Miro Ulčar.
On October 2, 2006, a Ljubljana, Slovenia court sentenced Plut to 30 years in prison for killing Ulčar. On April 26, 2007, a court in Niš, Serbia sentenced him in absentia to 40 years in prison for killing Đošić.
He committed suicide in his Ljubljana prison cell on April 28, 2007, by overdosing on sleeping pills.