associate kline calling professor of psychology at harvard medical school. thank you guys for joining us. mike, i want to devote my first question to you. >> sure. >> in this case, like in new town, the shooter was living with his mother, but aguilar's mother said she saw no signs of any of this. how can someone in such close proximity not see anything unusual? >> well, i have a hard time believing it also, but many times, don, people who are closest to let's say the shooter, they might not recognize any signs, and, you know, what was the family dynamic going on at the time with her and her son? and, you know, he said he bought the gun for home defense. had he discussed that with her? did she not find it unusual that he had so much ammunition because apparently during the search warrant they went to the house and found a large amount of ammunition? did she not find that unusual, and i would like to know if he was exhibiting any signs, ever had any history of any mental illness, because apparently he had no prior criminal