KALAMAZOO, MI -- The suspect arrested in a mass shooting spree here that killed six and injured two acted alone, authorities said.

Jason B. Dalton, 45, was taken into custody shortly after he pulled out of a parking lot of a downtown Kalamazoo bar at around 12:40 a.m. Sunday. As he pulled out, a sheriff's deputy spotted the vehicle as the one identified in the shootings. Dalton was arrested without incident a few blocks away, authorities said in a press conference Sunday morning at Kalamazoo Department of Public Safety headquarters.

"We are very confident that we have the right person in custody. We have significant evidence to tie him to these incidents," said Kalamazoo County Prosecutor Jeff Getting.

He declined to discuss specific evidence, but said a semi-automatic handgun was seized from the Chevrolet HHR that Dalton was driving.

A 14-year-old girl, whom police originally believed had died, is clinging to life Sunday morning. "She is seriously, gravely injured but she is still alive at this point," Getting said.

The teen and four women she was with were shot in the parking lot of Cracker Barrel Restaurant off of I-94 and 9th Street in Kalamazoo County in the final shooting, at 10:15 p.m. Saturday, Feb 20.

The three shootings began at 6 p.m. in Richland Township, where a woman was shot multiple times. She is expected to survive.

Two men, and an adult and 17-year-old, were killed at about 10 p.m. in the Seelye Automotive parking lot on Stadium Drive.

The names of victims have not been released pending notification of family.

"As to a motive, that's one of the things we are working hard to try to establish," Getting said.

The prosecutor said there was no apparent connection between between Dalton and the victims.

"They appear to have been chosen at random because they were available," he said.