MARINETTE, Wis. -- A Michigan man who killed three teens in a shooting rampage at a popular swimming spot on the Wisconsin border last summer was sentenced Thursday to life in prison without parole.

Scott J. Johnson, 38, was sentenced to three consecutive life terms for the teens' deaths and 295 years for six counts of attempted first-degree intentional homicide and one count of second-degree sexual assault.

Johnson showed no emotion when he heard the sentence. He told The Associated Press in March he's as indifferent to the homicides as if he had spilled a glass of milk.

Before the sentencing, Johnson said he still felt no regret and was as much a victim in life as the three teens he killed in a rampage along the Menominee River in July.

His statement prompted victim Bryan Mort's mother, Sylvia, to stand and begin shouting angrily. When two police officers asked her to be quiet, she threw up her hands and stormed from the courtroom, swearing at Johnson as she left.

Assistant Attorney General Roy Korte said later that he understood the mother's outburst.

"It was very emotional in there," Korte said. "It was difficult to hear that."

He added that he was "very pleased" with the sentence and glad that Marinette County Circuit Judge Tim Duket saw through Johnson's delusions.

Defense attorney Carrie LaPlant didn't comment specifically on the sentence but said she asked for Johnson to receive a chance at parole at some point because she does that for every client.

She said she has discussed an appeal with Johnson and he will make a decision on it soon.

Johnson, of Kingsford, Mich., pleaded no contest in March to 10 felonies, including three counts of first-degree intentional homicide. The homicide convictions carry mandatory life sentences, although Johnson could have been given a chance for parole.

Johnson initially pleaded insanity but dropped that in January. A court-appointed psychologist who examined him reported he told her his "purpose was to kill. Jesus could have been walking with Moses that day and I would have killed them."

In March, Johnson pleaded no contest to sexually assaulting a 24-year-old woman near the river the day before the shooting rampage. He told investigators he knew police would come looking for him after the assault, so with nothing to lose or live for, he plotted to kill.

He killed Tiffany Pohlson, 17, of Vulcan, Mich., and Anthony Spigarelli, 18, and Mort, 19, both of Iron Mountain, Mich. Daniel Louis Gordon, now 21, of Kingsford, Mich., was hit in the back but survived.

Honorably discharged from the Army in 1994 without seeing combat, Johnson was unemployed and had been living with his mother, Judy Johnson. She described him as despondent since his wife left him in 2001 and took their two children to Ohio.