U.S. President Barack Obama delivers remarks during a press briefing at the Edgartown School on August 14, 2014 in Edgartown, Massachusetts.

U.S. President Barack Obama delivers remarks during a press briefing at the Edgartown School on August 14, 2014 in Edgartown, Massachusetts.

*Attorney General Eric Holder will brief President Barack Obama on the situation in Ferguson, Missouri, on Monday afternoon following perhaps the most violent night of demonstrations since the fatal shooting of unarmed 18-year-old Michael Brown.

The president, who arrived at the White House early Monday morning for a scheduled break in his family vacation in Martha’s Vineyard, will meet with Holder at 1:15 p.m., the White House announced.

As previously reported, Missouri Gov. Jay Nixon has called in the National Guard to address the “intensifying violent attacks” there. The Democratic governor’s announcement came early this morning after increased tensions in the Missouri city following the release of the identity of Ferguson police officer Darren Wilson, who shot and killed Brown on Aug. 9, and the institution of a state of emergency and curfew over the weekend.

A preliminary autopsy released Sunday indicated that Brown was shot at least six times, including two shots in the head. The results showed that Brown was shot four times in the right arm.

Dr. Michael Baden, the former chief medical examiner for the City of New York who conducted the autopsy, said the bullet that caused the fatal injury struck Brown near the top of his skull and suggested he was bent forward when it hit.

On the same day, Holder ordered the Justice Department to arrange for an additional autopsy to be performed as part of the federal investigation into Brown’s death.

“Due to the extraordinary circumstances involved in this case and at the request of the Brown family, Attorney General Holder has instructed Justice Department officials to arrange for an additional autopsy to be performed by a federal medical examiner,” DOJ spokesman Brian Fallon said in a statement Sunday. “This independent examination will take place as soon as possible.”

Baden said of the Federal autopsy, “It shows the interest and the concern the federal government has in this kind of death. Never as far as I recall has the president of the United States got involved.”

Baden said six bullets struck Brown, including two head wounds and added there weren’t any signs of a struggle. However, Baden said x-rays, which should be available at some time whether in the next few weeks or month, will give more information. He added that “at some time” there will be access to Brown’s clothing.

“But often in an investigation like this, it’s not uncommon for prosecutors not to want information released, but I think in my experience, when that happens it only get the community more upset,” Baden said.

On ABC’s “Good Morning America,” on Monday morning, Brown’s mother Lesley McSpadden called the autopsy “very, very troubling.”

“It confirms our worst fears that the witnesses were telling the truth — that our son was shot many times,” she said during the interview. “What is worst is the head shot.”

Sherrilyn Ifill, president of the NAACP Legal Defense and Educational Fund, criticized the Ferguson Police Department on Monday for failing to release the information first uncovered by the autopsy. “The revelation that Michael Brown was shot six times is something that we could have learned from the police on Sunday, on Day One,” she said on MSNBC. “This is a perfect example of the way in which the unnecessary withholding of information has created more concern, more questions.”