Mexico: Forensics indicates remains not those of the missing students

Argentine forensic experts working in Mexico with the families of the 43 missing Ayotzinapa teachers college students report that the remains found in plastic bags do not correspond to any of the students' DNA. Federal Attorney General Jesus Murillo Karam had reported last week that the remains were probably those of the students, a claim not accepted at the time by their families. Clayton Conn reports from Mexico City.