XVII. A killed his wife and buried her in their backyard. He immediately went into hiding in the mountains. Three years later, the bones of A’s wife were discovered by X, the gardener. Since X had a standing warrant of arrest, he hid the bones in an old clay jar and kept quiet about it. After two years, Z, the caretaker, found the bones and reported the matter to the police. After 15 years of hiding, A left the country but returned three years later to take care of his ailing sibling. Six years thereafter, he< was charged with parricide but raised the defense of prescription. a. Under the Revised Penal Code, when does the period of prescription of a crime commence to run? (1%) b. When is it interrupted? (1%) c. Is A’s defense tenable? Explain. (3%)