EXPLAINER: Can a person facing a case still testify as a witness in legal proceedings?

During the impeachment trial of Vice President Sara Duterte, Senator-judge Robin Padilla had asked the prosecution to avoid presenting witnesses who were facing charges. But is having a case grounds to bar someone from being a witness?

EXPLAINER: Can a person facing a case still testify as a witness in legal proceedings?

During the impeachment trial of Vice President Sara Duterte, Senator-judge Robin Padilla had asked the prosecution to avoid presenting witnesses who were facing charges. But is having a case grounds to bar someone from being a witness?