Last I read, he was spotted on side of tracks, just standing,, alone. someone on train reported him.
Note- he was shedding some clothes as he ran away from dorm- another symptom of mj laced w/ pcp.
interesting article which perfectly describes symptoms of mj w/ pcp. sounds just like jr.'s reaction.
http://www.cchrflorida.org/pcp-laced-marijuana-creating-psychosis-and-psychiatric-commitment/
Could also be a "synthetic marijuana" which isn't actually marijuana but herbs and spices sprayed with chemicals. Some users also take their clothes of. It also could cause violent and irrational behavior.