WICHITA, Kan. (AP) — A Wichita music teacher who resigned in March has been charged with having sexual relations with a student.

The Wichita Eagle reports 25-year-old Alan J. Martens was charged Thursday in Sedgwick County District Court with unlawful sexual relations. His preliminary hearing is scheduled for later this month.

Prosecutors say Martens engaged in “sexual intercourse, lewd fondling or touching, or sodomy” around March 4 with a female 16 or older who was a student at Wichita Heights High School, where Martens was in his first year of teaching.

A March 13 police report says a principal reported four students witnessed an incident involving another student at the high school.

Martens’ attorney wasn’t available for comment Friday afternoon.