Meanwhile , it was Ambrose who promoted the use of dogs to look for drugs like heroin and marijuana .
The program was discontinued within weeks ; instead , the Mexican police was expected to search for illicit drugs in cars driving into U.S. soil .
It was Ambrose who promoted the use of dogs to look for drugs like heroin and marijuana .
The program was discontinued within weeks ; instead , the Mexican police was expected to search for illicit drugs in cars driving into U.S. soil .