CA's factual findings NOT reviewable on appeal if supported by substantial evidence

The threshold issue is factual: whether or not there indeed existed a standing warrant for the arrest of the petitioner. At the outset, this Court reiterates the general rule that when supported by substantial evidence, factual findings of the Court of Appeals are final and conclusive and may not be reviewed on appeal. A careful scrutiny of the records of the case at bench leads this Court to concur with the Court of Appeals in its finding that when the petitioner was arrested, there was then a standing warrant of arrest against him in connection with Criminal Case No. 471. This fact is manifest from the testimonies of the arresting officers which the defense failed to rebut during trial. [G.R. No. 110569. December 9, 1996]