His charges consist of six counts of murder, two counts of attempted murder and eight charges relating to firearms offences.
According to police, the alleged shooter claimed that a "devil figure" on the Uber app had been controlling him. A short time after that, he open fired on cars parked outside a Cracker Barrel restaurant around 8km from the site of the Kia shooting, killing four additional people and wounding one more as they sat inside their cars.
After his guilty plea on Monday, Dalton faces a life sentence without parole, Kalamazoo Prosecuting Attorney Jeffrey Getting said in a statement.
Throughout the rest of the hearing, Dalton remained in a holding cell with two police escorts, following the hearing by video conference.
According to the AP, Solis advised Dalton not to plead guilty.
Dalton was found competent to stand trial, but had made freakish outbursts at past court appearances. Mary Lou Nye, 62, of Baroda, Michigan, was killed along with Dorothy Brown, 74; Barbara Hawthorne, 68, and Mary Jo Nye, 60, all of Battle Creek, Michigan.
"He either shook his head or said no, and I said, 'Are you sure?' " Derek continued.
'I think he was influenced the last few days by his family... it was against my advice, ' Dalton's lawyer, Eusebio Solis, told reporters Monday.
His wife Carole Dalton told police he warned her on the night of the shootings that they "couldn't go back to work anymore and the kids could not go back to school".
"We're very happy that we're able to reach this resolution", Getting told reporters Monday.
Getting said he was also shocked by Dalton's decision.
Dalton had been picking up riders as an Uber driver on February 20, the day of the shootings.
He told investigators the Uber app made him "like a puppet" and that it would "take over your whole body".