The Wisconsin Court of Appeals has denied the argument from a Chippewa Falls man that he should get a new trial.
Prosecutors told the court Colton Treu had been hutting aerosol fumes moments before his vehicle veered off the road near Lake Hallie and killed a Girl Scout leader, her daughter, and two other Scouts in November 2018.
The four victims were pickup up roadside litter when they were hit by his pickup.
Treu claimed he should have been allowed to withdraw his guilty and no contest pleas.
He also claimed his lawyers provided ineffective defense.
The court disagreed and he will have to serve the 54-year sentence.