In 1971 , he successfully completed the seizure of 200 pounds of pure heroin entering the United States in three batches .
Meanwhile , it was Ambrose who promoted the use of dogs to look for drugs like heroin and marijuana .
In 1971 , Ambrose successfully completed the seizure of 200 pounds of pure heroin entering the United States in three batches .
Meanwhile , it was Ambrose who promoted the use of dogs to look for drugs like heroin and marijuana .