Police have said Hassanen was out with a group of more than a dozen friends at about 3:40 a.m. June 18. The group was walking back to their mosque, the All Dulles Area Muslim Society, after eating at a McDonald's ahead of a daylong fast. Observant Muslims fast from sunrise to sunset during Ramadan, which this year coincided with the summer solstice. As a result, teens from the mosque sometimes went out for fast-food meals in the overnight hours between the late-night and early morning prayer services.