Interpol had been looking for Sonmez since 2008, when a Turkish man collapsed in the airport in Pristina, Kosovo, and reported that his kidney had been stolen.

2008年，一位土耳其男子在科索沃的普里斯·蒂娜机场突然晕倒，之后的报道说此人的肾脏已被窃取，国际刑警组织自此开始搜捕桑麦资。