Justice Secretary Leila M. De Lima Wednesday ordered the investigation on the background of police Supt. Hansel Marantan.
Marantan was the team leader of the group of policemen who conducted a checkpoint that resulted in the death of 13 people in Atimonan, Quezon last Sunday.
According to De Lima, she has ordered the National Bureau of Investigation to investigate the report that the "encounter" in Quezon province was the fifth incident involving Marantan such that many families of the victims are crying for justice.
Earlier Tuesday, President Benigno S. Aquino III ordered the NBI to conduct an investigation of the "encounter" in Quezon in order to make sure that the result of the investigation will be fair and credible.
It was learned that Marantan was the only one who sustained injuries in the joint police-military contingent that conducted a checkpoint in Atimonan, Quezon.
It was reported that Marantan was earlier criminally charged by one of the 13 victims pertaining to the death of six people in Calamba City, Laguna last Nov. 18.
It was alleged that one of the 13 victims in the Atimonan encounter was a "gun for hire" and a collector in an illegal numbers game being run by Victorino Siman.
The brother of Victor Siman, Gerry, who was also one of the 13 victims, earlier filed murder charges against Marantan before the Calamba City Regional Trial Court.
Marantan is also facing another murder case recommended by the Commission on Human Rights in connection with the death of three suspected carjackers in Ortigas Center, Pasig City in 2005.
In 2006, Marantan was involved in the death of four individuals when he headed the Traffic Management Group in the hot pursuit of the victims from Quezon City up to Bulacan.
In 2008, Marantan was also involved in the death of robbery suspects in Parañaque City, however, he was blamed in the death of a motorist, Alfonso De Vera and his seven-year old daughter.
Some 25 policemen were charged because of that incident in 2008, but Marantan was absolved of the charges.