Zaur Dadayev is a former a member

A Russian court has found the main suspect in the killing of opposition leader Boris Nemtsov guilty.
Zaur Dadayev shot the former deputy prime minister, a vocal critic of President Vladimir Putin, in February 2015 near the Kremlin.
He and four other ethnic Chechens on trial were allegedly promised $250,000 (£192,000) to kill Nemtsov.
The late opposition leader's relatives fear whoever ordered the killing will never be found.