AUBURN, Ala (NEWSnet/ AP) - Auburn Police have reported that 39-year-old Jerel Raphael Brown, the suspect in Wednesday's shootings on I-85 in Alabama and Georgia, had more than 2,000 rounds of ammunition and an "alarming number of firearms."

Auburn police shared evidence of multiple guns and more than 2,000 rounds of ammunition taken...

Police are trying to determine the motive for the three separate shootings that left one motorist critically wounded.

Brown was arrested on Wednesday with the ammunition and firearms in his 1996 white Cadillac Fleetwood.

Auburn Assistant Police Chief Michael Harris said they had not found a motive for the "seemingly random shootings" as of Thursday night but would investigate Brown's "digital footprint" for clues.

Authorities responded first to a 45-year-old man who had left his car and collapsed on the pavement with a gunshot to his head, apparently fired through his rear window as the interstate passes through Auburn. The victim was taken by helicopter to a Montgomery hospital.

Harris said police began investigating the Auburn shooting at about 6:15 a.m. Wednesday, and later learned that a shooting had occurred an hour earlier in Montgomery, Alabama, and then an hour later in Troup County, Georgia. The three communities are about 55 miles (88 kilometers) apart.

Interstate 85 in Auburn was closed for hours while police investigated.

No one was injured in the Georgia shooting. No details on the Montgomery shooting were immediately released.

Harris said a dozen local, state, and federal agencies aided the investigation. Deputies in western Georgia's Troup County said they identified the suspect vehicle using a traffic camera, allowing information about the car to be broadcast around the region. A deputy in Chambers County, Alabama, then spotted the vehicle and arrested Brown, who was handed over to Auburn police.

Police released images of a table covered with what appeared to be three handguns, at least seven long guns with scopes, clips, and boxes of ammunition they said were recovered from the car.

"Because of the alarming amount of weaponry recovered, combined with the actions of the suspect, there can be little doubt that the immediate collaborative efforts of all the agencies involved ended an act of danger to the public that spanned multiple communities and into multiple states," Harris said.

Brown is charged with attempted murder and shooting into an occupied vehicle in connection with the Auburn shooting. Authorities said that Brown also faces charges in Georgia of aggravated assault, possessing a gun while committing a felony, and first-degree criminal damage.

He was ordered held without bond, and court records did not indicate if he had an attorney to speak on his behalf.

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