As Maryland Mall Re-Opens, Police Continue To Search For Motive In Shooting

COLUMBIA, MD - JANUARY 27: Security guards prepare for the Mall in Columbia to reopen two days after three people were shot and killed at the shopping mall January 27, 2014 in Columbia, Maryland. Authorities say Darion Marcus Aguilar, 19, killed two employees at the skateboarding and surfing clothing store Zumiez in the mall before fatally shooting himself. Investigators still have no motive for the shooting. (Photo by Chip Somodevilla/Getty Images)