Colorado shooting: Investigation, memorials
From left, Tylecia Amos, 14, Shatyra Amos, 15, Michael Walker, 17, and Mykia Walker, 16, carry flowers to lay at a makeshift memorial across the street from the Century Theater parking lot where twelve people were killed and dozens were injured in the attack early Friday at the packed theater during a showing of the Batman movie, "Dark Knight Rises." AP
