ST. PAUL (AP) — A 17-year-old Maplewood boy has been sentenced to nearly 22 years in prison for stabbing his girlfriend to death in February.

Anthony Mitchell pleaded guilty as an adult to second-degree murder in May. He was sentenced Tuesday.

Mitchell was arrested a week and a half after his 16-year-old girlfriend, Anna Hurd of North St. Paul, was found stabbed to death in a Maplewood park.

Mitchell testified at his plea hearing in May that Hurd was supposed to board a bus for Texas Feb. 23 and that he wanted to accompany her, but she told him in the park she didn't want to be with him anymore.

Mitchell asked his mother to call 911 shortly after the stabbing. He initially gave police conflicting stories.