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Investigation unfolds. anderson. >> veronica, thanks. more perspective from the fbi special agent and profiler, mary ellen o'toole. thanks for being with us. this is such an odd -- this is just a bizarre mystery. investigators now having dna and other lab results. what are they going to be looking at to narrow down a sus suspect? and is a police force like this able to investigate a crime like this? if they need help, can they get it? >> great questions. let me address the forensics. what they're doing is -- the focus is really going to be on the gold standard, which is dna. and hopefully when...

Where the mothers had a passion for guns, and many people in that case blamed the mother for what happened. and it is fair to say in this case in oregon, some of the same questions are going to be asked, ashleigh. >> and nancy lanza was the first person who he killed point blank in the head, and still, she was assailed for her parenting given that she had a son with mental illness, and celebrated the guns. you say that she didn't post anything online about this, and she didn't castigate the guns with gun safety laws and brag of oher son's knowledge of guns. i want to bring in dr. gail saltz he...