ROANOKE, Texas (CBSDFW.COM) – A former Northwest ISD middle school teacher and cheer coach in Roanoke will spend at least six years in prison for having sex with a student.

Katherine Harper, pleaded guilty on Thursday to sexual assault of a child and improper relationship between teacher and student.

asuspect2 Former North Texas Teacher Sent To Prison For Having Sex With Student

Katherine Harper

Harper was a teacher and coach at Tidwell Middle School.

In December 2016, Trophy Club Police say they received information from Northwest ISD that Harper, then 27, had an improper relationship with a former student who was 15 years old at the time.

Police arrested Harper in March 2017.

This was her mug shot at the time.

aharper Former North Texas Teacher Sent To Prison For Having Sex With Student

Katherine Harper – March 2017