A little more than four hours later and 15 miles away, a father and his 18-year-old son were fatally shot while looking at cars at the dealership.
Fifteen minutes after that, five people were gunned down in the parking lot of a Cracker Barrel restaurant along Interstate 94, Matyas said. Four of them died.
A 14-year-old girl had earlier been reported among the fatalities, based on a pronouncement by medical officials. But police later said that she was hospitalized in critical condition.
Authorities did not believe the shootings were targeted at specific people, describing them as "our worst-case scenario," Matyas said.
"These are random murders," he said.
Dalton was arrested without incident about 12:40 a.m. after a deputy spotted his vehicle driving through downtown Kalamazoo after he left a bar parking lot, authorities said.
Matyas declined to disclose anything found in the vehicle except for a semi-automatic handgun.
"In this particular case, we're just thankful it ended the way it did —before he could really kill anybody else," Matyas said.
By midday, authorities were investigating a Facebook post that indicated the suspect was driving for Uber during the manhunt and had taken at least one fare, Getting said.
A spokeswoman for Uber confirmed that Dalton had driven for the company in the past, but she declined to say whether he was driving Saturday night.
Uber prohibits both passengers and drivers from possessing guns of any kind in a vehicle. Anyone found to be in violation of the policy may be prohibited from using or driving for the service.
Dalton was in contact with more than one person during the rampage, authorities said, but they would not elaborate. Prosecutors said they do not expect to charge anyone else.
"There's no common denominator with any of these," Matyas said. "This person was just waiting in the parking lot of the apartment complex. The one at ... the dealership, they were looking at cars. The ones at Cracker Barrel, they were just sitting in their cars. There is absolutely no common denominator ... through race, age, anything."
Authorities were interviewing Dalton and reviewing his phone. They did not know if the handgun belonged to him, Getting said.
"This is every community's nightmare — when you have someone going around just randomly killing people, no rhyme, no reason," Getting said.
Tammy George said the woman who was shot outside the apartment building is her next-door neighbor. She and her family heard the gunfire, ran outside and saw the woman on the ground.
Four bullets went into a closet of George's home, she said. Her son, James, was playing video games with two friends a few feet away from where the bullets pierced the wall.
"I checked out the back window and saw a car speeding off," said James George, 17.
On Sunday morning, Tammy George came outside to clean the parking lot.
"I was worried about the kids coming out and seeing their mom's blood," she said. "I cleaned it up. No kid should have to come out and see their parent's blood on the ground."
During a Sunday morning news conference, some law enforcement officials wiped teary eyes or got choked up. When the news conference ended, Kalamazoo Mayor Bobby Hopewell and Department of Public Safety Chief Jeff Hadley embraced.
"It's hard to put into words the impact something like this has," Getting said. "How do we put an end to the fear this is causing? There's this sense of loss, there's anger, there's fear."
The four people killed outside the restaurant were identified as 62-year-old Mary Lou Nye of Baroda and 60-year-old Mary Jo Nye, 68-year-old Barbara Hawthorne and 74-year-old Dorothy Brown, all of Battle Creek.
On Sunday, the Cracker Barrel was closed and its parking lot blocked off with crime-scene tape.
Late Sunday night, mourners streamed into a Kalamazoo church for a prayer service intended to honor the victims and help residents cope.
With a population of about 75,000, Kalamazoo is about 160 miles west of Detroit. It is home to Western Michigan University and the headquarters of popular craft beer maker Bell's Brewery. The city also is known for the anonymously funded Kalamazoo Promise program, which has paid college tuition of students who graduate from Kalamazoo Public Schools for more than a decade.
The Associated Press