A part-time band instructor for Eaglecrest High School has been arrested on suspicion of sexual assault on a child by one in a position of trust.

On Wednesday, investigators in Jefferson County were told by the Arapahoe County Sheriff's Office about an investigation of Geoffrey Adam Banninger, 23, who was allegedly having sex with a 16-year-old student.

The incidents allegedly happened at Banninger's house near Golden.

Banninger was interviewed by Jefferson County investigators and subsequently arrested on suspicion of sexual assault on a child by one in a position of trust and for sexual assault on a child, pattern of sexual abuse, which are both class 3 felonies.

Banninger, who was fired by the Cherry Creek School District, had also been a volunteer coach with the Arvada High School Band.

The Jefferson County School District has prohibited his access to schools and students.

Banninger is being held on a $5,000 bond.