 The total is equivalent to a black money market of $3.5 billion/year.Three of the better-known gangs involved in scandal were the Kocaeli Gang (Hadi Özcan), the Söylemez Gang and the Yüksekova Gang.The Soylemez Brothers gang (which included serving police and military) were caught with plans to raid the headquarters of the Bucak clan in Siverek, Urfa, the head of which is the DYP member of parliament (MP) Sedat Bucak, the only survivor of the crash.