. >> reporter: the shooter, police officer anthony carelli, is a decorated officer. his lawyer said, we trust that the grand jury will rightfully determine that officer carelli's actions, while perhaps not understandable or acceptable to family members, attorneys, and other emissaries of the chamberlain family, were justified under our laws. chamberlain's niece will soon testify before that grand jury. she wants to know why police couldn't diffuse the confrontation and wouldn't ask the family to help. >> just to hear him constantly say over and over again, please leave me alone, i'm okay, and the way they mocked him and picked at him, it's very hurtful. >> anderson, i'm going to have more on this story tomorrow morning when i talk to kenneth chamberlain's son on my show "starting point" tomorrow at 7:00 a.m. >> so there was a 911 call. why were police there? >> well, the 911 call basically says a person has triggered their alarm, and that will trigger an ambulance, but often the police will get there ahead of time. so the police happened to get there first. >> what k