article_snippet.sent: The defense's first witness was Dr. David Greenblatt, a professor at Tufts University School of Medicine, who testified  that the drug PCP can cause people to be suddenly violent, even days after smoking it.
article_snippet.sent: you'd expect to see something lingering of PCP psychosis or intoxication,' Prosecutor Patrick Bomberg said, asking if Greenblatt could detect such behavior. '
highlights_snippet.sent: First witness was doctor discussing how First witness co-defendants were on PCP .
  