Who is Baste Duterte in VP Sara Duterte’s impeachment trial?

MANILA, Philippines — Davao City Mayor Sebastian “Baste” Duterte on Tuesday serves as the prosecution’s witness on the 31st day of the impeachment trial of her sister, Vice President Sara Duterte. He was called to testify and produce Davao City government records involving transactions with GenCorp Industries Inc. which the prosecution team alleges is linked