CENTENNIAL, Colo. – The officers struggled to hold back the tears as they recalled the Colorado theater shooting: discovering a 6-year-old girl without a pulse, trying to keep a wounded man from jumping out of a moving police car to go back for his 7-year-old daughter, screaming at a gunshot victim not to die.

"After I saw what I saw in the theater – horrific – I didn't want anyone else to die," said Officer Justin Grizzle, who ferried the wounded to the hospital.

A bearded, disheveled James Holmes, the man accused of going on the deadly rampage, didn't appear to show any emotion as Grizzle and the other officers testified Monday in a packed courtroom as survivors and families of those who died watched quietly. At one point, a woman buried her head in her hands when an officer recalled finding the 6-year-old girl.