MANILA, Philippines ? The Presidential Commission on Good Government (PCGG) is giving Mariano Tanenglian, brother of businessman Lucio Tan, a last chance to appear before officials of the agency prior to being considered a witness in the cases against his estranged brother.

In a press conference, PCGG Commissioner Ricardo Abcede said Tanenglian should appear before PCGG officials if they are to consider his request for immunity from suit.

?We want to give him a chance to prove he is valuable and serious about testifying against his brother. This is the last chance,? Abcede said.

He added that granting immunity from suit to any witness is ?an important thing. It?s not that easy.?

Abcede said they want to interview Tanenglian and gauge whether his testimony would be valuable to the government?s cases against Lucio Tan.