CONCORD — The New Hampshire Supreme Court has denied a new trial for St. Paul’s School graduate Owen Labrie, who had claimed his lawyers did a poor job during his 2015 trial.

The state Supreme Court issued the ruling Friday, written by Justice Anna Barbara Hantz Marconi.

In the 19-page ruling, Hantz Marconi rejected arguments that lawyers should have raised a defense based on Labrie’s intent, and that St. Paul’s internal intranet system did not fit the definition of an internet system in state law.

Chief Justice Robert Lynn and Justice Patrick Donovan concurred.

Labrie reported to jail late last year to begin serving a year-long sentence for the sexual assault of a 15-year-old prep school classmate.

The state Supreme Court already rejected an appeal of the conviction.