Well here's an interesting twist to one of these:
www.joplinglobe.com
Teacher winds up marrying the student meaning the student can no longer be compelled to testify against the teacher leading to the charges being dropped as it became too hard to prosecute.

Teacher's marriage to student results in dismissal of charge
The charge against a former Sarcoxie High School teacher for having alleged sexual contact with a student has been dismissed in light of their subsequent marriage and its impact on
Teacher winds up marrying the student meaning the student can no longer be compelled to testify against the teacher leading to the charges being dropped as it became too hard to prosecute.