Answer:10;5.
Explanation:John Firman was an adjunct professor in the American University, he teaches Seminar in policing in the Graduate schools of the institution. He has also worked with the Governor of Illinois, where he worked as an Associate Director of the Illinois Criminal Justice Authority between the year 1985-1994 Mr. John Firman is the Director of the Research Division of the International Association of Chiefs of Police (IACP.) According to professor Firman,the most common restriction on hiring applicants for police service with a history of drug use within the recent past is ten years for hard drugs and five years for marijuana.