Peru's Supreme Court has upheld a 25-year jail sentence imposed on former President Alberto Fujimori.
The term was handed down last April for ordering the security forces to carry out killings and kidnappings.
Fujimori, who led Peru from 1990 to 2000, returned from exile in late 2007 to face his accusers.
It was the first time a democratically elected Latin American leader was found guilty of human rights abuses in his own country.
Fujimori had denied overseeing a death squad as part of a "dirty war" against suspected Maoist Shining Path guerrillas in the early 1990s.
But he was convicted of directing the killings of 25 people, following a 15-month trial.
Fujimori is serving three other concurrent prison sentences.
In September last year, he was found guilty of illegally tapping phones and bribing journalists, businessmen and opposition politicians.
Last July, he was sentenced to seven-and-a-half years for giving $15m (£9.3m) in state funds to his spy chief, Vladimiro Montesinos.
And in 2007, he was sentenced to a six-year term on separate charges of abuse of power.
After his government was brought down in 2000, Fujimori escaped to Japan, where his parents were born, and lived in exile for seven years.