The police officer who arrested Colorado movie theater massacre gunman James Holmes told jurors the shooter seemed very calm, relaxed and "sort of disconnected" when he found him standing behind the cinema where he had killed 12 people.
Holmes, 27, is charged with multiple counts of murder and attempted murder for opening fire inside a packed midnight premiere of the Batman film "The Dark Knight Rises" at a Denver-area multiplex in July 2012, also wounding 70 people.
The former neuroscience graduate student has pleaded not guilty by reason of insanity. Prosecutors say they will seek the death penalty if he is convicted. (Reuters)