BANGKOK: A 26-year-old Canadian found dead in his Thai police cell this week was wanted in the US for allegedly running a massive “dark web” marketplace for drugs and other contraband, a police source told Agence France-Presse on Saturday. Thai cops arrested Alexandre Cazes in Bangkok on July 5 and had planned to extradite him to the US, where he faced drug trafficking and money laundering charges. But the computer programmer hanged himself with a towel in his detention cell on July 12, according to Thai anti-narcotics police, who have been tight-lipped on the details of his case. On Saturday a Thai officer confirmed Cazes was wanted in the US for running a massive online black market. Speculation is rife that the underground marketplace was AlphaBay, considered the world’s largest and most lucrative darknet bazaar until it was taken down within hours of Cazes arrest. According to Nicolas Christin, a computer science professor at Carnegie Mellon University, AlphaBay gained prominence in 2015 and mostly traded in drugs, stolen credit card numbers and forged ID.