No sign of drugs were detected and no illegal substances were found , a law enforcement source told CNN last week . Law enforcement source gives details of jet 's flight from Canada . The smoke was so strong in jet 's cabin the flight crew put on oxygen masks , source says . Pilot ##s Bieber and his father were verbally abusive to the flight crew , source says . Crew rep Matthew Hiltzik declines interview to CNN .
Law enforcement source gives details of jet 's flight from Canada . The smoke was so strong in jet 's cabin the flight crew put on oxygen masks , source says . Pilot ##s Bieber and his father were verbally abusive to the flight crew , source says . Crew rep Matthew Hiltzik declines interview to CNN .