CNN Sanjay Gupta MD December 6, 2014 21:31:00
These drugs tore through a midwestern city ruining dozens of lives. >> reporter: in the week of june 10th, 2012, law enforcement in grand forks were dealing with an outbreak of violent overdoses. a mystery drug on the streets had already killed two teenagers. >> we've got multiple overdoses. two young men lost their lives. what's more serious than that? >> reporter: tim purreden is the u.s. attorney for north dakota. >> it was unprus dented. i've been u.s. attorney going on four years this is the only time we've reached out to a school system a university and said, hey, there's this danger on ...
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