Prosecutors have outlined their case against the American student charged with shooting a dozen people to death at a cinema in Colorado last July.
The hearing today, in which James Holmes, 25, faces more than 160 charges including first degree murder and attempted murder, will determine whether the case will go to trial.
According to investigators, Holmes was wearing body armour and a gas mask when he opened fire and tossed two gas canisters into the cinema on July 20th.
Twelve people died and 58 were wounded in the cinema which was screening the latest Batman film, The Dark Knight Rises.
More top news
A British scientist says the age women may be able to conceive children could soon be significantly extended.
Simon Cowell admitted he was "so embarrassed" after his shirt burst open during an X Factor audition.
Following the promise of further powers for Scotland, David Cameron is now talking about a new deal for the other home nations.