Beijinger:

Facebook was employed by police in Chaoyang District in a drug investigation that began April 17 and resulted in the detention of five foreign international school students for marijuana use and three foreign drug dealers carrying marijuana, ice, and heroin, The Beijing News reported Friday night

The revelation was part of a bevy of new details that emerged from a police report released Friday detailing an investigation that started when four international school students were caught smoking marijuana in the Beijing Riviera home of two of the suspects April 17.

It is unclear which of the suspects are still in custody, three weeks after the first arrest.

The report indicates police were initially tipped off by an unnamed informant who pointed out the suspects’ Facebook activity to police. Using that as a lead, investigators were able to catch the students in the act at home on the evening of April 17, with a camera crew in tow (video here).

The report names the four students detained in the original raid as being two New Zealanders and two Americans. From previous reports it is known that three of the suspects are 18 years old and the fourth, 17.