"There are many pieces of the puzzle we don't have yet. The forensic part is very important. It's not done yet," Vance said. "And interviewing witnesses – we are far from done. The number of witnesses we need to talk to is immense," he said.
He also said that misinformation has been going out via social media, and that there are social media sites posing as the shooter, Adam Lanza, and as purporting to be people related to the crime. These are violations of federal and possibly state law, and will be investigated and prosecuted, he said.
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