NEWTOWN, Conn. (AP) — The parents of one of the 20 first-graders killed in the Sandy Hook Elementary School massacre met with the gunman's father for more than an hour in an effort to bring some closure to the tragedy, asking him about his son's mental health and other issues.

Alissa Parker told "CBS This Morning" in an excerpt of an interview that aired Thursday the meeting with Adam Lanza's father, Peter Lanza, was her idea. Her 6-year-old daughter, Emilie, died in December's shooting rampage.

"I felt strongly that I needed to tell him something, and I needed to get that out of my system," Alissa Parker said. "I felt very motivated to do it and then I felt really good about it and prayed about it. And it was something that I needed to do."