Riley Strain‘s University of Missouri classmates came to their feet as his family accepted his diploma during a commencement ceremony last weekend. The 22-year-old graduated with a bachelor’s degree in interdisciplinary studies and a minor in business. Mother Michelle Whiteid led family who accepted on his behalf. She broke down crying as she hugged administration. Strain died in Nashville on March 8 after an evening spent hopping around several downtown Nashville honky-tonks.He was in town for a fraternity event.A toxicology report is complete but not yet released.Related: Riley Strain Toxico…