Chemistry major accused of poisoning black roommate possibly involved in SECOND attack

An ex-Pennsylvania college student accused of leaving racist graffiti for his black roommate in their dorm room and poisoning him with a toxic metal is reportedly being investigated for a second poisoning. Per The Lehigh Morning Call, District Attorney John Morganelli announced Thursday that they’re investigating whether Yukai Yang, 22, poisoned another Lehigh University student. Morganelli declined …