"Someone called and said soldiers were on their way"
Witness to massacre
At least 57 people died in the massacre, believed to be the worst ever politically-related killings in the Philippines.
"Boy", who is now in hiding fearing his life is in danger, said all of the women in the group had been raped before being killed.
Their bodies were then dumped in mass graves that had already been dug out in advance using an excavator.
He said that Ampatuan Jr had also ordered that the reporters accompanying the convoy should also be killed to cover-up what had happened.
"That too was ordered by Datu Andal… because they didn't want any evidence left behind," he said.
|At least 57 people died in the Philippines worst politically-related massacre [Reuters]
"Boy" said the whole process had lasted little more than an hour before the gunmen had to abruptly abandon the scene following a warning that members of the military were nearby.
"We didn't get to finish, which is why the excavator was left there," he said.
"Someone called and said soldiers were on their way. I feel they have connections among the soldiers."
Speaking with his face covered to his identity, "Boy" said he was supposed to have been an active participant in the massacre but did not actually kill any of the victims.
He said he would have been shot if he had tried to intervene.
"I was just standing there," he said "I was all alone… I could only leave it up to my conscience."