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By Steve Kastenbaum, Holly Yan and Michael Pearson

FERGUSON, Missouri (CNN) — An autopsy conducted for the family of Michael Brown found no evidence that he struggled with a Ferguson, Missouri, police officer before his death, the pathologist in charge of the examination said Monday.

Police have said the 18-year-old fought with Officer Darren Wilson in the moments before he was shot in an incident eight days ago that left the young man dead, his community in turmoil and many around the nation angry and thirsty for answers.

Dr. Michael Baden said no signs of a struggle were revealed in his autopsy of Brown’s body, conducted after an official examination by the St. Louis County Medical Examiner’s Office.

And forensics consultant Shawn Parcells, who assisted Baden, said the findings are consistent with witness reports that Brown may have been shot as he walked away and that he was shot again with his hands up.

Brown family attorney Daryl Parks said he was particularly concerned about gunshots that medical examiners hired by the family indicate came from behind and above.

“Why would he be shot in the very top of his head, a 6-foot-4 man?” Parks asked. “Makes no sense.”

The autopsy results are the latest development in the investigation into Brown’s death, which has resulted in nightly, sometimes violent, protests in Ferguson that have prompted Missouri’s governor to declare a curfew and send in the state National Guard.

“Given these deliberate, coordinated and intensifying violent attacks on lives and property in Ferguson, I am directing the highly capable men and women of the Missouri National Guard … in restoring peace and order to this community,” he said in a statement.

The protests have also gained international attention. The United Nations secretary-general on Monday issued a statement about the events in Ferguson, saying that he “hopes local and federal investigations will shed full light on the killing” of Brown. Ban Ki-moon called on authorities to ensure that people are able to assemble peacefully and urged law enforcement to abide by U.S. and “international standards in dealing with demonstrations.”

Gunfire, tear gas and Molotov cocktails Sunday night marked some of the fiercest clashes yet between police and protesters furious about the death of an unarmed teenager.

Autopsy findings

The family autopsy found that Brown was shot at least six times, including two shots to his head. Three of the bullets may have re-entered his body, causing additional damage, Baden said.

One wound to his arm was consistent with a witness statement that Brown was walking away and appeared to jerk, as if shot, Parcells said. The wounds to his arm could have also have occurred while he had his hands up, possibly in a defensive posture, Parcells said.

One of the bullets entered the back of his head and came out through his eye, another — likely the fatal wound, Baden said — struck Brown on the top of his head and caused irreparable damage to his brain.

Family attorney Benjamin Crump said Brown probably would have been either kneeling or bending forward when he was struck with those bullets.

Brown had abrasions on his face consistent with falling onto the ground, Baden said.

He cautioned that he needs access to autopsy results, including tests on Brown’s clothes and X-rays, before making some conclusions.

But Crump said what it already revealed offered more than “ample” evidence to support Wilson’s arrest.

“What does this autopsy say? That the witness accounts were true, that he was shot multiple times,” Crump told reporters.

Devolution of protests

Another family attorney, Anthony Gray, implored protesters to remain peaceful.

“I can see that there is a very disturbing divide that is developing in our community,” he said Monday. “This is not what we initially came to the community and called for.”

As he spoke, the Missouri National Guard was preparing to deploy to Ferguson under orders from Gov. Jay Nixon to restore peace.

Nixon issued the order early Monday after what began as peaceful protests spiraled into disarray after two civilians were shot and injured, Missouri State Highway Patrol Capt. Ron Johnson said. He said those civilians were not shot by police.

“Tonight, a Sunday that started with prayers and messages of unity, peace and justice took a very different turn after dark,” Johnson said early Monday morning.

Some protesters hurled Molotov cocktails at police, and several businesses were vandalized or looted, despite the Brown family’s call for calm.

“Based on these conditions, I had no alternative but to elevate the level of our response,” Johnson said.

Officers fired tear gas into a crowd of hundreds of protesters, including children, who were marching toward a police command post despite an impending midnight curfew.

But protester Lisha Williams challenged the notion that protesters provoked officers.

“That is a lie. It was no fight, it was no shots fired,” she told CNN late Sunday night. “All we did was march to the command center to fall to our knees and say, ‘Don’t shoot.’ And they started shooting.”

The clashes kept escalating, with St. Charles County sheriff’s officials saying shots were fired in their direction.

At one point, employees at a McDonald’s restaurant locked themselves in a storage room after the store was overrun, Johnson said.

Video from CNN affiliate KSDK showed children among the protesters chanting, “Hands up, don’t shoot.”

St. Louis County police said most of the crowds had dispersed after the curfew went into effect at midnight. The curfew was scheduled to end at 5 a.m. (6 a.m. ET).

But the anxiety remains. Children can’t even go to school Monday.

“Information we received from officials on the scene late Sunday evening has contributed to concerns we have about children walking to school or waiting for buses on streets impacted by this activity,” the Ferguson-Florissant School District said on its Facebook page.

Dueling narratives

Accounts of exactly what happened when Wilson stopped Brown while the teen was walking down a street vary widely.

Witnesses said they saw a scuffle between the officer and Brown at the police car before the young man was shot.

Several witnesses said Brown raised his hands and was not attacking the officer.

Piaget Crenshaw said she was sitting in her home when she witnessed the shooting. She captured video of the aftermath, including images of Brown’s body lying in the middle of the street.

“From it all initially happening, I knew this was not right,” she told CNN’s “New Day” on Monday.

“I knew the police shouldn’t even have been chasing this young boy and firing at the same time. The fact that he got shot in the face, it was something that clicked in me, like no, somebody else needs to see this. This isn’t right. I’ve got to record.”

Crenshaw said Brown was running away from police and then turned around. She said that was when Brown was shot.

But police gave a different narrative, saying Brown struggled with the officer and reached for his weapon.

Though the officer has stayed out of the public spotlight, more than 22,000 people have endorsed the “I Support Officer Wilson” Facebook page.

U.S. Attorney General Eric Holder has approved another autopsy on Brown’s body, the Justice Department said. That autopsy will be conducted by a federal medical examiner.

CNN’s Steve Kastenbaum reported from Ferguson; CNN’s Holly Yan and Michael Pearson reported and wrote from Atlanta. CNN’s Melanie Whitley, Jennifer Duck, Steve Almasy, Dave Alsup, Jim Acosta, Mayra Cuevas, Evan Perez and Joe Sutton contributed to this report.