Senior Superintendent Perla Bacual, police chief of Narra town, said they were looking into the possibility that some of the suspects may have been involved in other disappearances in the Palawan municipality since the 1980s.
Farm laborer Eladio Baule, his son Gerard Baule and nephews Sabtuary Pequi and Johnny Buyot allegedly killed the victim, Benjie Ganay, on July 17 after Ganay accidentally touched Eladio Baules daughters bottom during her wedding party, Bacuel said.
The four suspects, who were drunk at the time, then set fire to Ganays body, and Bacual said the aroma of roasting flesh may have tempted the group to eat parts of the burnt body.
The father and son then allegedly served some of the roasted flesh to other drinkers at the wedding party.
The crime was only discovered about eight days later, after the two nephews confessed to the police who originally found their accounts too shocking to believe.
The nephews insist that they did not take part in the murder but were only forced to eat parts of the body.