. >> board member ginger littleton is on her way to the side door exit. but she can't bring herself to leave. >> at that moment, i felt very strongly that in a few seconds he was going to begin shooting, and i had the option of leaving and feeling guilty that i left them to their death, or trying to do something. >> littleton tries to knock the gun out of the man's hand with the only weapon she has. her purse. >> no chance. >> she fails and is left at the gunman's mercy. but he lets her go. >> this man had some scruples and so he spared me and said, you stupid and called me a name which probably at that point i deserved at least the stupid part. >> with littleton out of the way, the gunman now confronts the remaining board members. >> i'm going to die today. >> can we talk for a minute? >> i've already been in prison. >> the gunman, 56-year-old clay duke had served four years for threatening his ex-wife with two guns. the issue now, his current wife who taught at a local elementary school was not offered a full-time position. >> you see, our benefits have

. >> narrator: the deadly assault on columbine high school in littleton. >> we're going to continue to follow this horrific situation taking place in littleton, colorado. >> fox has an alert on the horrific mass shooting... >> narrator: the school surveillance video showed police some of the story. terrorized students fled when they heard shooting in the hall-- 188 rounds. (rapid gunfire) then a bomb went off in the cafeteria as the two assailants, seen here, enter the room and hunt for student victims. they had killed 13 and wounded 23 more. >> you see some of the victims being taken out. we want to advise you we have no confirmation... >> i was in touch with my wife. and she was getting upset because she hadn't heard from daniel. she had gone to one of the places where they were taking students who had escaped, and his name was not on the board. she didn't see him. he didn't call. >> narrator: tom mauser's son daniel was a sophomore, 15 years old, studious and quiet. by nightfall his parents went home to wait. >> we had to spend that night not knowing if he was dead or alive. you cry

. >> so gen accuses mark of abusing mary during a visit in littleton. county sheriffs investigate.nce to support the allegation. and the county attorney in grafton county declines to prosecute. i think she really believed that that was the case, that mary was being abused, no one was listening to her, and she believed it would continue. >> genevieve began to take mary quietly behind the scenes to doctors. doctors would say, i don't think that happened. why are you saying that happened? >> and she decided to make a tape that somehow illustrated that mary had been victimized. and that was when things really got bad. >> the assistant county attorney provided us with a tape that genevieve kelley had produced at the house involving mary, dropped it off at the office here. so i sat down and watched the tape. i was looking for any evidence of wrongdoing by mark nunez who is the father. but throughout the tape, all i saw was this bizarre, strange conduct by the mother who was absolutely brainwashing the daughter and trying to get daughter to say things against her daddy. >> he's not going

clayton sandell, abc news, littleton, colorado. >>> there are warnings and advisories about ice in theorologist justin povick. how is it looking? >> thanks. the northeast off to a sunny start, but a chilly start. it's going to be cold all day long here on friday. high pressure in place. that's the supplier some of frigid air. that's not going anywhere. really any time soon. cold enough over much of the country that we're still talking about freezing rain, sleet and snow into texas and oklahoma. had it on thursday. more of it on friday. that means more slippery travel this go around along interstate 44 and i-40. rain south and east of there toward dallas and houston and new orleans. there will be some more airport delays and some of the rain spanning out into the southeast around huntsville, birmingham, atlanta and into the carolinas late day. reena and kendis, back to you. >>> president obama is among those mourners mourning the passing of former new york governor mario cuomo this morning. cuomo died just hours after his oldest son andrew was sworn in for his second term leading the st