MANILA - An anti-crime group has asked the Office of the Ombudsman to investigate former Philippine National Police chief Alan Purisima for allegedly usurping official functions in his involvement in the Mamasapano incident.

In a complaint filed Friday, the Volunteers Against Crime and Corruption (VACC) accused Purisima of illegally acting as a person in authority in Oplan Wolverine, also known as Oplan Exodus while under preventive suspension. The Ombudsman had suspended the former police chief in December 2014, over the allegedly anomalous 2011 PNP courier service contract.

The complaint cited the Senate Mamasapano Report, where Purisima admitted advising then Special Action Force Director Getulio Napenas to keep the mission between them, and to exclude DILG Secretary Mar Roxas and General Leonardo Espina from the loop.

According to VACC Chairman Dante Jimenez, Purisima should have no longer given instructions to Napenas because Gen. Espina was the officer-in-charge of the PNP at that time.

"Hindi na siya PNP pero siya'y nag-uutos. Nagbibigay pa siya ng direct order kay General Napenas. Na dapat ay inuutos kay General Dindo Espina ng PNP, siya ang OIC nun," Jimenez said.

Jimenez said the VACC is also working with a group of lawyers in preparing a complaint for reckless imprudence resulting in multiple homicide against Purisima and President Aquino, which will be submitted to the Ombudsman on July 1, once the president's term ends. The group believes the President is ultimately responsible for the botched operation.

"Siya ang nagbigay ng utos sa suspended chief...dalawang dates...December kung saan suspended na si Chief PNP at ito pong January. There was a deliberate attempt to cover up," said Jimenez.

The VACC is also not satisfied with the way the Senate handled the Mamasapano case hearing.