GR No. L-36234 February 10, 1981 People of the Philippines, plaintiff-appellee Vs. Romeo Corpuz, et.al., appellants Fernandez, J.: Facts: All accused, being prisoner of New Bilibid Prison, were charged with murder and frustrated murder for assaulting and wounding co-prisoners. The trial court sentence them with Quai-recidivism. Issue: Whether or not the trial court erred in applying Article 160. Ruling: Yes. Under the RPC Article 160, the elements of this offense are: 1. The offender was already convicted by final judgment of one offense; 2. The committed a new felony before beginning to serve such sentence or while serving the same. In this case, the Supreme Court found that the trail court erred in applying article 160 on the unfounded assumption that all defendants were serving sentence pursuant to judgments of conviction which had become final and in the absence of competent evidence that these defendants have been sentenced by final judgment. It is not proven that the accused in this case are serving a sentence by final judgment which would suffice to quality the offense committed with the special aggravating circumstances of Quasi-Recidivism.