Officers who arrested Colorado cinema gunman James Holmes have said he seemed keenly interested in the aftermath of the shootings as victims were treated nearby.
The officers testified that Holmes first wore a vacant expression but later looked intently out of the window of a squad car where they placed him.
They say he was sweaty and smelly and obeyed all their orders when they found him in the car park behind the cinema which had been showing a new Batman film.
Holmes's lawyers say he admits he was the gunman who killed 12 people and injured 70 in the suburban Denver cinema in July 2012. But they say Holmes is severely mentally ill and did not know right from wrong.
Prosecutors have described Holmes as calculating and smart. They say he believed killing others increased his own worth.