KORONADAL CITY - After weeks of surveillance, a former public school teacher here was arrested along with his friend during anti-drug operations by the Koronadal City Anti-Drug Abuse Council (CADAC) Tuesday.Dr. Glorio Sandig, CADAC action foficer, said and drug buy bust operation was conducted against Cyrus Calixtro, 32, also known as Ray Ray, of Marville Homes, Barangay Sto. Nino, Koronadal City long suspected of pushing illegal drugs. Calixtro was a former teacher of Koronadal public school.Arrested with him was Winston Rivera, 30 of Barangay Avancenia, Koronadal City.