(CBS News) Aurora police chief Daniel Oates rejected media reports that a second person of interest is associated with Friday's massacre in Colorado. He said James Holmes is the only suspect but they are interested in speaking to anyone who knows or has had contact with Holmes.
"All the evidence we have, every single indicator, is that... this is all Mr. Holmes' activity and that he wasn't particularly aided by anyone else," Oates said in an exclusive interview Sunday on "Face the Nation. "We're building a case to show that this was a deliberative process by a very intelligent man who wanted to do this."
Oates said the person brought in to be questioned on Saturday "was a casual consequence."
"The relationship was real inconsequential," he said. "[I]t's really an inconsequential matter."
Oates Also discussed the sophistication of Holmes' apartment which was rigged full of explosives. "I think it speaks volumes about his intelligence and his deliberation and his cold-bloodedness. I could not believe the pictures I saw from the robot about the way this thing was designed."
A computer was obtained from Holmes' apartment and has been handed over the FBI for analysis, which Oates said will be part of an exhaustive investigation.
As Holmes was dressed in armor similar to SWAT team members, Oates said he is "so proud" of two officers who spotted part of Holmes' costume that differs from what a SWAT team member would be wearing. "So kudos to my two cops who grabbed this guy and that sharp observation that they made immediately that led them to suspect him as being the suspect," Oates said.
The police chief also said he spent some time with some of the families who had lost loved ones and that the president's visit to Colorado Sunday is "very, very powerful."
"I can't tell you how important this visit is," Oates said. "We were so pleased to be able to tell them through our victim advocates contacting the families yesterday, that the president was coming here, and these families need that kind of contact by our elected leader, and it will be very powerful, and it will help them."
Oates, whose daughter was also attending a midnight showing of the Batman movie early Friday (but at a different theater), said this could happen to anyone or any parent across the United States. "That's the perverse things about this."