Yale University's expulsion of the basketball team captain last month is adding to growing criticism nationwide about how colleges investigate and discipline students accused of sexual misconduct.

Jack Montague is vowing to sue Yale for expelling him last month. The dispute involves a sexual encounter in 2014 with a woman who claims it wasn't consensual, but Montague said it was. No criminal charges were filed.

Montague's lawyer says the discipline was based on weak evidence and an unfair process — a complaint echoed by dozens of other disciplined students across the country.

According to the advocacy group Boys and Men in Education, students disciplined for sexual misconduct have filed more than 100 lawsuits against universities nationwide.