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AURORA, Colo. (AP) Police in Colorado say the suspect in one of the worst shootings in U.S. history is not cooperating with authorities.
Aurora Police Chief Dan Oates says 24-year-old James Holmes has ``lawyered up'' and is not talking.
Holmes was arrested Friday after a gunman opened fire during a midnight screening of ``The Dark Knight Rises,'' killing 12 people and injuring 58. He has been appointed a public defender and is scheduled to make an initial court appearance on Monday.
Oates says it could take months to determine a motive and police are working with FBI behavioral analysts.
The police chief says Holmes had more than 50 commercial packages delivered to his home and school address during the past four months.
Meanwhile, President Barack Obama is in Colorado to meet with families of those killed Friday.
Air Force One touched down late Sunday afternoon at Buckley Air Force Base in Aurora. The president's visit includes a private meeting with the victims' loved ones and meetings with state and local officials about the shooting early Friday morning at a busy multiplex.
It is Obama's second trip in less than a month to comfort Colorado residents. He made a quick visit in late June to Colorado Springs, where hundreds of homes were destroyed in the most devastating wildfire in the state's history.
The shock of Friday's mass shooting brought the presidential campaign to a standstill for the weekend.
A San Diego pastor remembers the Colorado shooting suspect as a shy boy who was driven to succeed in school.
Jerald Borgie of Penasquitos Lutheran Church said Sunday that he never saw James Holmes, now 24, mingle with others his age at the church.
Borgie says that if he and Holmes had conversations, it was the pastor who initiated them.
He says Holmes took pride in his academic ability but didn't brag about it.
Borgie says the Holmes family has belonged to his church for about 10 years but he last spoke to James Holmes about six years ago.
Inside the church Sunday, signs read ``Prayers for those affected by the Colorado tragedy'' and ``Prayers for the Holmes family.'' Dozens of churchgoers wrote messages of support for the family.