On Thursday morning, Major Nidal Malik Hasan gave most of his belongings to his neighbor. Awhile later, a security-camera video showed him at a convenience store on Thursday morning buying snacks in a white robe and skullcap—traditional Muslim garb. Now, investigators are looking into the motive of the alleged Fort Hood shooter. The son of Palestinian immigrants, Hasan reportedly resented other soldiers who harassed him for being a Muslim and was distraught about his upcoming six-month deployment to Afghanistan. The death toll of his rampage rose to 13 on Friday, after a hospitalized victim died.