A police officer responding to the deadly Colorado theater shooting says he asked James Holmes twice whether he had an accomplice.
Officer Justin Grizzle says all he got was "self-satisfying offensive smirk."
Another officer who was also trying to figure out what was going on in the chaos testified Tuesday that Holmes told him he was the only shooter.
They testified that screaming and bloodied victims were still fleeing as they handcuffed and searched Holmes.
The hearing is about whether statements Holmes made before he was read his rights can be used during his trial next year.
Police say they had to find out if someone else was involved in the attack that killed 12 people. Prosecutors contend the questions were legal under a public-safety exemption to the Miranda rule.