The officer was shot to death 18 months ago while responding to a robbery call in Cypress Hills.
Shooter Lamont Pride is serving 45 years to life for the murder after he was convicted earlier this year.
Kevin Santos and Nelson Morales both face murder charges.
Brooklyn prosecutors said Pride and four others plotted to rob a small-time drug dealer on December 12, 2011.
The men broke into a shabby basement apartment in a building that belonged to Morales' uncle. But the uncle didn't know what was happening and called 911 when he heard a commotion downstairs.
Officers, including Figoski, arrived and surprised the robbers, who pretended to be victims until they were later arrested. Figoski was shot when he cornered Pride.
Figoski was posthumously promoted to detective.