River Of The Dead By Barbara Nadel

(Inspector Ikmen # 11)
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Convicted murderer and drug baron Yusuf Kaya has escaped from Istanbul prison. He appears to have had inside help...
Inspector Cetin Ikmen is called to investigate Kaya's contacts in the city, while Inspector Suleyman heads to Kaya's home town of Mardin, a dangerous city in the south east of Turkey. Back in Istanbul, as Ikmen delves deeper into Kaya's past, the body count continues to rise. Meanwhile, Suleyman discovers that Kaya has another wife in Mardin, an American woman heavily guarded by members of the Kaya clan. It's not long before the two Inspectors are caught up in a terrifying web of arms and drug running, terrorism, blackmail and murder...