Update :
http://www.tremeritus.com/2015/04/02/astar-scholar-charged-for-poisoning-labmates-drinks/
Personal comment : It's a tragedy that Ouyang Xiangyu didn't seek medical psychiatric help sooner. Now the rest of her highly promising life (after she completes her prison jail term in the USA) is completely ruined, whether she is in USA, Singapore or China. Fortunately her victims did not die, but nonetheless paraformaldehyde is highly carcinogenic, and her victims (including herself, self-poisoned on several occasions) will suffer an increased risk of cancer in the future.
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A*Star sponsors China girl (conferred Singaporean citizenship as part of scholarship entitlement) to US Uni, who then gets arrested for poisoning her fellow Uni colleagues with paraformaldehyde.
http://www.vice.com/read/a-stanford-medical-school-student-was-arrested-for-poisoning-her-classmates-water-bottles-331
One day in October 2014, a graduate student researcher at Stanford University's Nusse Lab took a drink from her water bottle. According to testimony she later gave to police, the student "immediately experienced a burning sensation in her mouth and throat. Her eyes became irritated and watery. She began salivating uncontrollably. Her throat was burning so bad that she could not even swallow the water."
When she smelled her water bottle, it reeked of paraformaldehyde. This wasn't the first time a member of the lab had ingested the toxic chemical. For weeks, researchers in the lab had been sniffing their water bottles before drinking, and multiple times each week, the bottles smelled strongly of paraformaldehyde. But none of the students suspected that they were being intentionally poisoned by the "awkward and quiet" second-year Stanford Medical School student in the lab, Ouyang Xiangyu, who is now being charged with four felony counts of poisoning.
The 26-year-old scientist had come to Stanford's Cancer Biology program from the prestigious Agency for Science, Technology, and Research (A-STAR) program in Singapore.
Full article :
http://www.vice.com/read/a-stanford-medical-school-student-was-arrested-for-poisoning-her-classmates-water-bottles-331