The high court in Fiji has found the Naitasiri high chief Ratu Inoke Takiveikata guilty of inciting to mutiny in 2000.
The rebellion was aimed at assassinating the military commander, Commodore Frank Bainimarama.
FBC News reports the assessors had delivered their guilty verdict before it was confirmed by the judge Justice Daniel Goundar.
Takiveikata will be sentenced tomorrow.
Takiveikata had been given a life sentence for the same mutiny but in early 2007 the appeal court quashed the ruling and he was released from prison after serving 31 months.
Last year, Takiveikata was jailed again when he was given a seven-year prison sentence for plotting to kill Commodore Bainimarama in late 2007.