Virginia Tech Shooting: Missed Warning Signs?

Gunfire on campus claims two victims, including a police officer.
1:40 | 12/09/11

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Transcript for Virginia Tech Shooting: Missed Warning Signs?
-- tech last night we showed you images of the campus and locked -- students surrounded by armed guards as gunshots -- two people. One of the -- police officer and we can that won't tell you. About the young man named as the gunman a -- -- -- student. Now called the shooter here's ABC's Jim shootout. Police now believe the second deadly shooting to rock this campus was a murder suicide but still struggling to understand why. The shooter 22 year old Ross -- Ashley of part of Virginia and a student at nearby Radford University. Shot officer -- -- to death while he was sitting in his patrol car during a routine traffic stop. Actually been changed his clothes and hands possibly to escape an intense manhunt unfolding within minutes after the shots were fired. But it didn't work soon after -- police deputy one of dozens of officers swarming the campus spotted him behaving strangely. As he approached the officer lost sight of him and then found him -- Investigators are still searching for a loading. We had made no connection. That the shooter and -- across knew one another prior to the shooting. Police say Ashley -- -- Mercedes SUV a day earlier and incredibly. Took a university shuttle bus to the campus and the intrigue dynasty -- The writing on the wall nearby where the shooter died mentioning a woman's name. Authorities are refusing to say whether officer kraus an army veteran and father of five was able to defend himself before he lost his life. -- shoot -- ABC news Blacksburg Virginia.

This transcript has been automatically generated and may not be 100% accurate.

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