Philippine bar exam questions 2008 (Crim.Q11)

Ricky was reviewing for the bar exam when the commander of a vigilante group came to him and showed him a list of five policemen to be liquidated by them for graft and corruption. He was further asked if any of them is innocent. After going over the list, Ricky pointed to two of the policemen as honest. Later, the vigilante group liquidated the three other policemen in the list. The commander of the vigilante group reported the liquidation to Ricky. Is Ricky criminally liable? Explain. (7%)