(NEWSER– The man who opened fire in a Maryland mall over the weekend, killing two skate shop employees before taking his own life, does not appear to have had any relationship with his victims, police say. Investigators aren't sure what Darion Marcus Aguilar's motive for the attack was, but they say a journal found in the home of the 19-year-old Dunkin' Donuts manager reveals "some general unhappiness with his life," NBC reports. Aguilar, who used a legally bought shotgun, also had some crude homemade explosives in his bag, police say.

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