he says the boredom and the stress pushed this platoon to escape. >> how long did the drug use in this unit continue? >> the smoking of the hashish? >> yeah. >> probably up until about a week and a half ago. >> from the beginning until now? >> yes. >> prominently? was it around consistently or what? >> bad days, stressful days, days that we just needed an escape. >> reporter: cnn placed several calls to attorneys representing the two soldiers. calls not returned. according to the soldiers' taped interviews the drugs came from locals who laced hash with opium. >> this paints a picture of u.s. army soldiers smoking hash at night, killing afghans by day. how is it possible that if this is true, that nobody knew? in authority? nobody put a stop to it? >> that's impossible that nobody knew.