Denver Cinema Shooting: Hunt For Motive

Police in Colorado have recovered a computer belonging to cinema shooting suspect James Holmes, amid reports that the semi-automatic rifle used by the gunman jammed during the attack.

The PC is being studied by officers after it was found inside Holmes apartment in Aurora, near Denver, which had been booby-trapped with trip wires and at least 30 improvised explosives devices.

Holmes, a 24-year-old former medical student, is in police custody accused of killing 12 people at a midnight screening of the new Batman film, The Dark Knight Rises, earlier this week.

As US President Barack Obama arrived in Denver to meet relatives of the victims, the names of those shot dead in the Denver cinema have been revealed, with the youngest victim just six years old.

A total of 58 other people were injured in the attack. Some remain in critical conditions in hospital.

It is thought the gunman was forced to switch to a different weapon with less fire power after the assault rifle he was using jammed.

This would tally with what some of the witnesses have said, that during the shooting there was a break that enabled them to scramble out of the cinema.

At Holmes' apartment building, authorities are still collecting evidence, but investigators already have in their possession a computer found at the flat.

Aurora police chief Dan Oates told American television: "With the assistance of the FBI that computer will be completely analysed.

"That may take some time. So we're hopeful that will yield some information."

Meanwhile, the University of Colorado has also said it is trying to ascertain if Holmes used his position as a graduate student to obtain dangerous materials.

The budding scientist and now, accused mass killer, got deliveries over four months to his home and school, authorities have said.

A spokeswoman said the university is looking into what was received at the college to assist police with their investigation.

Police have said they found jars of liquids, explosives and chemicals that could have killed "whoever entered" Holmes' apartment.

Holmes is due to make his first court appearance on Monday.