An Indonesian militant was convicted of helping to build the massive car bomb used in the deadly 2002 Bali nightclub attacks and sentenced to 20 years in prison Thursday, concluding the trial for the case's last main defendant.

Known as "Demolition Man," Umar Patek, 45, is a leading member of the Al Qaeda-linked network Jemaah Islamiyah. He was found guilty by the West Jakarta District Court of violating the country's anti-terror law for his role in the Oct. 12, 2002 Bali resort island attacks that killed 202 people, including 88 Australians and seven Americans.

The five-member judge panel also sentenced him for his involvement in Jakarta church attacks on Christmas Eve in 2000 that killed 19.

Prosecutors had sought a life sentence for Patek, who was accused of illegal weapons possession, concealing terrorist acts, immigration violations and premeditated murder in the Bali bombings.

More than 240 police, including a team of snipers, were deployed in and around the court building for the last session of the trial, which began in February.