Kyrgyz prosecutors say a prison guard was involved in the high-profile jail break by convicted Islamist militants last year.
A state prosecutor, speaking during the ongoing trial on May 10, said the prison guard was bribed and released the nine convicts, who then escaped the detention center on the outskirts of Bishkek in October.
The prosecutor said the convicts killed four prison guards while fleeing the facility.
Six of the escapees were recaptured shortly afterwards, while three were killed in a shoot-out.
Officials said later that two of the recaptured convicts died of heart attacks and another of a brain hemorrhage while in custody.
The three remaining recaptured men are on trial for murder and breaking out of jail. Two other co-defendants in the case have been charged with providing shelter to the convicted felons.