Sandy Hook Elementary victim: Madeleine Hsu, 6

Dr. Matthew Velsmid was at Madeleine's house on Saturday, tending to her stricken family. He said the family did not want to comment.

Velsmid said that after hearing of the shooting, he went to the triage area to provide medical assistance but there were no injuries to treat.

"We were waiting for casualties to come out, and there was nothing. There was no need, unfortunately," he said. "This is the darkest thing I've ever walked into, by far."

Velsmid's daughter, who attends another school, lost three of her friends.