PIERRE, S.D. (AP) - A 16-year-old Pierre boy has pleaded not guilty to charges connected to the fatal shooting of a classmate.

Braiden McCahren is charged with first-degree murder in the Dec. 18 shooting of 16-year-old Dalton Williams. If convicted of that murder charge, he could be sentenced to up to life in prison.

McCahren also is charged with attempted first-degree murder and aggravated assault because he allegedly pointed a gun at a third 16-year-old boy who was also in the house. The attempted first-degree murder charge carries a maximum sentence of 25 years in prison, while aggravated assault carries a maximum sentence of 15 years.

McCahren is charged as an adult.

After a court hearing Friday, Hughes County State's Attorney Max Gors said he will oppose moving the case to juvenile court.