The man accused of opening fire in a crowded Colorado movie theater left a trail of evidence that police say suggests the rampage was part of a calculated plan that included killing anyone who tried to learn more about him in the aftermath of the attack, CNN informs. The revelations raised new questions about a possible motive in the attack in the suburban Denver community of Aurora that shocked a nation. President Barack Obama was scheduled Sunday to meet with victims’ families and get an update on the investigation.Authorities have said little about what they believe was the motive of suspect James E. Holmes, though investigators say there is evidence planning was under way for up to two months before the attack early Friday that left 12 dead and 58 wounded at the theater.Holmes, 24, is being held in connection with the shootings at the theater and the subsequent discovery of his booby-trapped apartment, which authorities believe he rigged before leaving for the Century Aurora 16 multiplex.Holmes received a high volume of deliveries over the past four months to both his home and work addresses, which police believe begins to explain how he got his hands on some of the materials used in the attack and those found at his apartment, said Aurora Police Chief Daniel Oates. Colorado Gov. John Hickenlooper told CNN Sunday that he spent a day going from hospital to hospital, talking with survivors. He concluded that Holmes was a person who wanted to terrorize and instill fear in people’s lives, but said he can’t conceive of a motive. “This is a deeply troubled, twisted, delusional person,” he said. Police gained access Saturday to Holmes’ apartment after intentionally detonating two rigged explosives. Technicians, with the help of a robot, worked to handle traps, wires and possible explosive and incendiary devices, Jim Yacone, a special agent with the FBI, told reporters Saturday. The operation proceeded with an eye toward preserving evidence, all of which will be sent to an FBI lab in Quantico, Virginia, Yacone said.Hundreds of residents were evacuated from five buildings, including the modest, three-story brick building where Holmes told police he had rigged his top-floor, one-bedroom apartment with explosives. All occupants except those who live in the suspect’s building were allowed to return home Saturday night, police said.