Police testify in James Holmes' hearing, recount Aurora shooting CENTENNIAL, Colo., Jan. 7 (UPI) -- James Holmes was calm and near his parked car when he was arrested for allegedly opening fire in an Aurora, Colo., theater, a police officer testified. "He was very relaxed," police officer Jason Oviatt told an evidentiary hearing in Centennial, Colo., Monday. It was like there weren't normal emotional responses to anything. He seemed very detached. Police officers were the first to testify in what is expected to be a week-long hearing in Colorado's 18th Judicial District court to determine if sufficient evidence is available to move the case against Holmes to trial, The New York Times reported. Holmes, 25, faces 164 counts of murder and attempted murder, and a weapons possession charge in the July movie theater rampage that killed 12 people and injured 58 others. He has not yet entered a plea. Prosecutors are laying out their case for the first time, The Denver Post said. Police reports from the day of the shooting noted Holmes "stared off in space" and "seemed out of it" at his arrest. Oviatt said in court Holmes understood directions and fully complied with officers, "not doing anything, not in any hurry, not excited, not urgent about anything." Oviatt also said Holmes warned him of explosives in his apartment, wired to go off if they were tripped. Officers who entered the theater, and drove victims to local hospitals, also testified Monday, the Post reported. Officer Aaron Blue spoke about holding victim Jessica Ghawi in the back of his car as another officer drove them, saying, "Every time she moved, she stopped breathing," and officer Justin Grizzle held back tears as he described entering the crime scene and seeing "several bodies throughout the theater laying motionless" and later driving six victims to hospitals. Two overflow rooms were set up with a live video feed of the proceedings. One room was to be reserved for 100 or so victims and family members who said they planned to attend. Chief Judge William Sylvester is responsible for determining if there is "probable cause" to believe a crime was committed. On June 7, the day he failed a key oral exam at school, he bought a lightweight AR-15 semiautomatic rifle to add to his collection, prosecutors have said. The shooting was among the worst mass shootings in U.S. history although it has been overshadowed by later attacks, including last month's Newtown, Conn., massacre of 20 Sandy Hook Elementary School students and six school employees. On Saturday, 4 miles from the Aurora mall where the movie theater shooting occurred, four people were killed, including the suspected gunman, after a six-hour standoff at a town house.