In this courtroom sketch, a guard with the Afghan National Army named Nematullah is shown on the right-hand side of a video monitor as he sits next to a translator (at left in the monitor) and testifies from Afghanistan in the military preliminary hearing of US Army Staff Sgt. Robert Bales, shown seated third from lower left, Friday, Nov. 9, 2012, in a military courtroom at Joint Base Lewis McChord in Washington state. Bales is accused of 16 counts of premeditated murder and six counts of attempted murder for a pre-dawn attack on two villages in Kandahar Province in Afghanistan in March, 2012. Friday's session was held at night to facilitate the video testimony from Afghanistan.- AP Photo

JOINT BASE: An Afghan National Army guard who reported seeing a US soldier outside a remote base the night 16 civilians were massacred in March said the man did not stop even after being asked three times to do so.    

The guard, named Nematullah, testified by live video from Kandahar, Afghanistan, on Friday night during an overnight session for a hearing in the case against Staff Sgt. Robert Bales.

''I told him to stop,'' the guard said, through an interpreter, though he did not say whether the man was Bales. He said the man came toward him, said ''how are you'' in Pashto and went inside the base.

Under cross-examination from Bales' attorney, John Henry Browne, who traveled to Afghanistan to question the witnesses, the guard said he saw the man but could not identify him.

Browne pressed further, asking if the guard could describe the soldier at all. The guard said he was white and well built, but those were the only details he could provide.

Nematullah also said the soldier was coming from the north, which is the direction of a village that prosecutors say Bales attacked first in the nighttime rampage March 11.

Bales could face the death penalty if he is convicted in the massacre. The preliminary hearing will help determine whether he faces a court-martial.

The hearing was also expected to feature testimony from two victims and four relatives of victims.

The villagers will speak to a military courtroom at Joint Base Lewis-McChord during the overnight session to accommodate the time difference.    Bales, a 39-year-old Ohio native and father of two from Lake Tapps, Wash., faces 16 counts of premeditated murder and six counts of attempted murder in the attack in southern Afghanistan.

Prosecutors say that Bales wore a T-shirt, cape and night-vision goggles, no body armor, when he slipped away from his remote post, Camp Belambay. He first attacked one village, returned to the base, and headed out again to attack another village, they say.

In between, he woke a fellow soldier, reported what he'd done, and said he was headed out to kill more, the soldier testified. But the soldier didn't believe what Bales said, and went back to sleep.

Nine children were among the victims, and 11 of the victims were from the same family.

Another Afghan National Army guard who reported seeing a soldier return to Belambay and then leave again was also scheduled to testify.

On Thursday, a US Army DNA expert testified that Bales had the blood of at least four people on his clothes and guns when he surrendered.

The blood of two males and two females was discovered on Bales' pants, shirt, gloves, rifle and other items, said Christine Trapolsi, an examiner at the Army's Criminal Investigation Laboratory.

To preserve the evidence, she said she only tested a portion of the bloodstains, and it's possible more DNA profiles could be discovered through additional testing.

Another forensic expert from the Criminal Investigation Lab, fiber specialist Larry Peterson, testified that a small piece of fabric that matched the cape Bales reportedly wore was discovered on a pillow in one of the attacked compounds.

Prosecutors referred to the cape as a blanket, but Peterson said it was more like a decorative covering for a window or doorway.    Bales has not entered a plea and was not expected to testify.

His attorneys, who did not give an opening statement, have not discussed the evidence, but say Bales has post-traumatic stress disorder and suffered a concussive head injury during a prior deployment to Iraq.

A US agent who investigated the massacre has testified that local villagers were so angered it was weeks before American forces could visit the crime scenes less than a mile from a remote base.

By that time, bodies had been buried and some bloodstains had been scraped from the walls, said Special Agent Matthew Hoffman of the Army's Criminal Investigation Command.

Other stains remained, on walls and floors. Investigators recovered shell casings consistent with the weapons Bales reportedly carried.

Hoffman also said Bales tested positive for steroids three days after the killings.    Bales leaned back in his chair at the defense table and did not react as an Army doctor, Maj.

Travis Hawks, gave clinical descriptions of treating the wounded villagers as they arrived at a nearby forward operating base.

One girl had a large bullet wound in the top of her head, he said.

She was unresponsive at first, but survived after treatment.

A woman had wounds to her chest and genitals, but she and her relatives insisted that the male doctors not treat her. Prosecutors showed photos of the victims being treated.