University of Colorado officials were reportedly looking into whether James Holmes' used his role in a graduate program of the University to acquire the arsenal used in the Aurora shooting rampage.

The officials are keeping mum about whether they had any clue that the suspect was anything more than a quiet, hard-working student, reports Philly News.

Holmes, 24 accused of the shooting at a movie premiere, was a graduate student of neuroscience program at the University.  He was also one among the six students to receive federal grant to pursue the program.

Apparently, Holmes is being non-cooperative with the officials as he was being held in the solitary confinement at a Denver-area county detention facility and has "lawyered-up," said Dan Oates, Aurora Police Chief.

He also added that it could be months before they learn the motive behind the shootings-that claimed the lives of 12 and injured 58- with authorities working with the FBI behavioural analysts who are currently looking into the relationships of Holmes.

According to the Police, Holmes began buying guns at Denver area stores nearly two months before the Friday's shooting and he received almost 50 packages at his home and school during this period.

The reason behind his withdrawal from the University's five-to-seven year program just after a year into the program is still a mystery. The University said that Holmes did not give any reason for his withdrawal.

The University also claims that he was not allowed access after his withdrawal and assured that he had no contact with the university police either.

In the meantime, a local gun range owner has reportedly told the AP that Holmes applied to join the club last month but was never approved because of his behaviour and a 'bizarre' message he left on the owner's voicemail.

Holmes is scheduled for an initial hearing Monday morning and has been assigned a public defender.