A former vice dean of USC’s Keck School of Medicine testified Tuesday that he feared the school’s then-dean, Dr. Carmen A. Puliafito, “could be doing drugs” and expressed concerns about his general well-being to the university’s No. 2 administrator before Puliafito abruptly left his job in 2016.  Dr. Henri Ford’s testimony at a hearing of the state Medical Board marks the first suggestion that any USC administrator had suspicions about Puliafito’s possible drug use before he stepped down.