MANILA - Forensic experts from the Philippine National Police (PNP) and the Public Attorney's Office (PAO) on Thursday agreed it was highly likely that Kian Loyd Delos Santos was already down on the ground when he was shot dead in a police operation in Caloocan City on Aug. 16.

The experts were called to the Senate inquiry into Delos Santos' controversial shooting to address conflicting results of their separate autopsies.

The boy's shooting has drawn public outrage as evidence, including security footage and witness statements, suggest that Delos Santos was executed.

PAO's Dr. Erwin Erfe said the examination found 3 entry wounds and 2 exit wounds on the 17-year-old's body. He said the bullets' trajectory indicate that the assailant was standing while the teen was down at the time of the shooting.

"'Yung trajectory po kasi ay acute angle, pababa. Pero doon sa katawan niya ay paitaas. Ang posisyon po ay nakatayo ang shooter at nakasubsob na po si Kian. Nasa paanan 'yung shooter," he said.

Dr. Erfe said based on PAO's findings, the 11th grader was shot thrice: twice in the head and once in the back. He added that there may have been two gunmen.

Meanwhile, Chief Insp. Jocelyn Cruz, the PNP medico-legal officer who examined Delos Santos' body, said 2 gunshot wounds the boy sustained indicate that he was kneeling when he was killed.

Sen. Bam Aquino showed Cruz a photo of Delos Santos, already dead, kneeling with his face on the ground, a gun on his left hand.

Asked if that was Delos Santos' position when he was shot, the medico-legal officer said: "Yes, your honor, based on the injuries that I've examined."

The only discrepancies between the two autopsy reports were the number of times Delos Santos was shot and the shooter's distance from the victim.

Cruz said the examination did not find any "tattooing" or gunpowder impact markings on the teenager's body -- a clear sign that the victim was shot point blank.

Erfe also said "tattooing" was not found on the body, indicating that the gun was "near contact, almost touching the left ear" when Delos Santos was shot.

Sought for third opinion, a medico-legal officer from the National Bureau of Investigation explained that "tattooing" should be present to conclude that Delos Santos was shot at point blank range.

As to the number of shots fired at Delos Santos, Sen. Grace Poe earlier directed both parties to show a photo of the body to prove their claims.

PAO chief Persida Acosta said the shirt that Delos Santos was wearing when he was killed would show a bullet hole on the back, the gunshot that the police did not see in their autopsy.