The commission created to investigate the murder of Benigno Aquino Jr. opened here today with the first witness, a government doctor who performed the autopsy, testifying that the gun that killed the opposition leader probably was fired upward.

Dr. Bienvenido Munoz said a bullet entered Aquino's head from behind the left ear, traveled upward and was deflected downward before exiting through his jaw.

Aquino, 50, was gunned down at close range Aug. 21 after he stepped off a plane from three years' exile in the United States. The government maintained that he was shot by a lone assassin, who in turn was shot dead by security guards.

The thrust of the testimony was to put in question the opposition's contention that Aquino was shot by guards standing above him. Opposition lawyer Juan David denounced Munoz's testimony as "against the laws of inertia and physics." Probe Into Aquino's Death Hears Testimony of Coroner Special to The Washington Post

MANILA, Sept 7--The commission created to investigate the murder of Benigno Aquino Jr. opened here today with the first witness, a government doctor who performed the autopsy, testifying that the gun that killed the opposition leader probably was fired upward.

Dr. Bienvenido Munoz said a bullet entered Aquino's head from behind the left ear, traveled upward and was deflected downward before exiting through his jaw.

Aquino, 50, was gunned down at close range Aug. 21 after he stepped off a plane from three years' exile in the United States. The government maintained that he was shot by a lone assassin, who in turn was shot dead by security guards.

The thrust of the testimony was to put in question the opposition's contention that Aquino was shot by guards standing above him. Opposition lawyer Juan David denounced Munoz's testimony as "against the laws of inertia and physics."