
The tribunal found Abdul Quader Mollah, assistant secretary general of the Jamaat-e-Islami party, guilty of murder, rape and torture on the February 5.
The life sentence imposed at the time triggered protests by people hoping he would get the death penalty.
In response to such protests, Bangladesh's parliament amended a law to allow the state to appeal any verdict reached in the war crimes trials deemed inadequate.
More than 100 people have been killed in protests and counter-protests since January, when the tribunal set up by the government delivered its first verdict.
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