PNP chief, Gen. Dionardo Carlos (Photo courtesy of Senate PRIB) MANILA - The Philippine National Police (PNP) on Wednesday welcomed the initiative of some presidential candidates to undergo voluntary drug testing. "We will document the results, of course. It's good that they are serving as good examples to the public," said PNP chief, Gen. Dionardo Carlos, in a statement. He, however, said this will not stop the PNP from initiating an investigation in case there is valuable information that will link a candidate to the illegal drug trade or drug use. Carlos also reiterated that w...