Col. David W. Maxwell holds a press conference at the Marine Corps 

Col. David W. Maxwell holds a press conference at the Marine Corps Museum in Quantico, Va., on Friday, March 22, 2013 regarding a murder/suicide that occurred on Thursday night that resulted in the deaths of three Marines. A Marine killed a male and female colleague in a shooting at a base in northern Virginia before killing himself, officials said early Friday. (AP Photo/The Free Lance-Star, Peter Cihelka)
Associated Press
Col. David W. Maxwell holds a press conference at the Marine Corps Museum in Quantico, Va., on Friday, March 22, 2013 regarding a murder/suicide that occurred on Thursday night that resulted in the deaths of three Marines. A Marine killed a male and female colleague in a shooting at a base in northern Virginia before killing himself, officials said early Friday. (AP Photo/The Free Lance-Star, Peter Cihelka)
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