KENT, Wash. -- A teenager who pleaded guilty to stabbing a man in the back is sentenced in court.

Michael McMahill-Dearmond broke down and apologized for stabbing Michael Woolson near Carl Sandberg Elementary School in Kirkland last July.

McMahill-Dearmond was 17 years old when he said his friends coaxed him to jump out of a car and stab then 48-year-old Woolson.

The attack happened about 1:30 a.m. near the elementary school. Woolson was able to make it two blocks home where his sister called for help.

Prosecutors said McMahill-Dearmond attacked Woolson so he could steal his iPod.

McMahill-Dearmond turned to Woolson and his family to apologize.

“I am sorry for the pain and suffering I have caused your family,” McMahill-Dearmond said. “I'm not a bad person; I just did a really really stupid thing.”

Woolson said he still suffers pain everyday because of the stabbing and he also lost his salesman job because of all the time he had to take off of work.

“The brutality of how he came up from behind, snuck behind me and stabbed me leads me to believe that he would do it to anybody,” Woolson said. “He destroyed the last year of my life. I had to suffer with that.”

“What he did is horrible and I couldn’t even imagine. We all grow up learning right from wrong, unfortunately Michael never learned that,” said Elizabeth Walton, Michael’s aunt.

For his crime of first-degree assault and attempted robbery, a judge sentenced McMahill-Dearmond to more than 11 years in prison.

McMahill-Dearmond was also ordered to undergo mental counseling while he is in prison.