Presley Gerber cause of death still unknown after rehab facility overdose probe

Fox News senior medical analyst Dr. Marc Siegel discusses the Presley Gerber death investigation, college drug fatalities and his book 'The Angels Among Us' on 'America's Newsroom.'

Fox News senior medical analyst Dr. Marc Siegel discusses the death investigation of Presley Gerber in California, toxicology reports and the discovery of cychlorphine and kratom in two student deaths at Ole Miss in Oxford, Mississippi.