An immigrant from El Salvador has been convicted of the 2001 murder of US intern Chandra Levy.
Ingmar Guandique had denied killing the 24-year-old whose body was found in Rock Creek Park in Washington DC more than a year after she disappeared.
The case claimed the career of a politician Ms Levy was involved with.
Californian Democrat Gary Condit was exonerated in the murder but forced from office. Prosecutors said police were wrong to focus on Mr Condit.
Scandal
Earlier in the trial, prosecutors said they had no eyewitnesses or physical evidence tying Guandique to Ms Levy's murder.
Defence lawyers said Guandique had become a scapegoat for a botched investigation.
But the prosecution presented evidence that Mr Guandique told prison cell mates he had carried out the killing, and they argued the details of the case matched patterns from other attacks against women in which Mr Guandique had been convicted.
Mr Guandique, from El Salvador, was serving a 10-year prison sentence for those attacks when he was charged for Levy's murder.
The intern's body was found in Rock Creek Park in Washington DC more than a year after she disappeared.
Mr Condit initially denied having an affair with Levy, saying they were just friends. But the scandal helped to end his political career.
Mr Guandique's lawyer argued that her client had been made a scapegoat, claiming that his DNA did not match samples found on Ms Levy's clothing.
BBC News
