An experimental study involving mentally ill subjects and mind-altering drugs was shut down at New York University’s medical school in New York City after a series of ethical violations, The New York Times reports. Eight separate psychiatric studies were put on hold. Among them: one that tested how subjects with posttraumatic stress disorder responded to an experimental drug with marijuanalike effects. Federal investigators say the study was riddled with problems including lax oversight and the falsification of records. The researcher in charge—who disagrees over the seriousness of the violations—has resigned, and the university has discarded all data collected.