1: Authorities have stepped up patrols in the neighborhood where Ahmed Al-Jumaili lived -- and died -- in their effort to find out who killed the 36-year-old early Thursday , as he and his brother stood in the parking lot of his apartment complex watching the snow . 2: Cotner said police are conducting tests to find out whether more than one rifle was used in the shooting , but he said he could not reveal the make or model of the weapon . 3: Dallas police say Ahmed Al-Jumaili was killed by shot from a rifle , but they are n't revealing what type .
1: Authorities 2: police 3: Dallas police