MANILA, Philippines — The Public Attorney's Office (PAO) is investigating an incident at its office in Meycauayan, Bulacan over a viral video showing unruly behavior by one its staff toward an elderly.Deputy Chief Public Attorney Ana Lisa Soriano told The Manila Times on Friday that PAO Chief Persida Rueda-Acosta ordered the investigation of the PAO-Meycauayan personnel, including its head.Soriano said Acosta understood the public's concern and …