Drugs in the classroom -- it's commonplace and a real problem here in South Texas. CCISD is fighting the problem with special forces. Even though they may not stop off-campus drug use, having specially trained dogs roaming the hallways sends a clear message while on campus.

Find out how these drug sniffing dogs are trained and why they are so important in keeping our schools drug free in a 3News Special Report: Contraband Canines.