Irrelevant Character Assassination
The impeachment trial in the Philippines functions as a hybrid political and judicial proceeding; any expert testimony must be directly relevant to the six constitutional grounds for impeachment, such as a betrayal of public trust or other high crimes. Since mental instability itself is not a ground for impeachment, an expert cannot testify merely to declare an official unfit. Even if they may assert relevance, the testimony faces strict legal and ethical hurdles under the Revised Rules on Evidence, particularly if the expert attempts to diagnose a public figure without a direct clinical examination, which violates professional ethics and can be dismissed as speculative by the defense. Historical precedents like the 2018 house hearings against Chief Justice Maria Lourdes Sereno was widely condemned by legal scholars as an irrelevant distraction and was criticized as highly politicized tactics for character assassination even if they may argue permissibility. It i...