A London teenager was convicted Monday of shooting a young mother in an alleged contract killing, although the victim\'s husband was acquitted. Santre Sanchez, 16, Gayle was 15 when he shot Gulistan Subasi, 28, The Sun reported. He is believed to be the youngest person ever found guilty of a murder for hire, the reports said. Two of Gayle\'s stepbrothers are already imprisoned for murder. Prosecutors said Gayle received 200 pounds ($320), only 10 percent of what he had been promised, and spent the money on clothes. During the trial, prosecutors said Subasi\'s husband, Serdar Ozbek, wanted her dead because he thought she was planning to return to Turkey with their young son. He allegedly sought a contract killer and the word was passed until it reached a member of the Kensal Green Boys, Izak \"Iceman\" Billy, who passed it on to Gayle. Billy was also convicted. He and Gayle were scheduled for sentencing Tuesday. A security camera showed a hooded figure shooting Subasi through a metal grill as her mother watched. \"When we saw the CCTV we were convinced we were looking for a professional,\" said Detective Chief Inspector Jackie Sebire. \"There was no hesitation and he was totally confident.\"