discussing that yet, saying now is the time for grief. a formal announcement on prosecuting the shooter will come at what they say is an appropriate time. in the meantime, people who know the gunman, who went to school with him, who lived near him, are painting a picture of a frightening and violent young man who even would introduce himself to people as, hi, i'm a school shooter. cnn's senior investigative correspondent drew griffin is joining us in parkland, florida. what else have you learned about this very disturbed person, clearly. >> you know, not only was he telegraphing through social media what he was doing, telling other people what he was about to do, he was being visited by the police. they had a long history with nikolas cruz, with his brother, with this family. interjecting with the family who was trying to deal with obvious mental illness, documented mental illness. nikolas cruz was being treated for many, many years for his various problems, which is why everybody in this community, you