Preliminary results from a private autopsy revealed that Michael Brown, the unarmed teenager that was killed by a police officer in Ferguson, Missouri, on Aug. 9, was shot at least six times, including twice in the head.

The independent autopsy was performed Sunday by Dr. Michael Baden, who also testified in the O.J. Simpson and Phil Spector murder trials, reports CNN.

The results showed that one of the bullets struck the top of the 18-year-old victim's head, suggesting that his head was bent forward at the time, said Dr. Baden, New York City's former chief medical examiner, according to The New York Times. The high-profile pathologist said that was likely the last bullet that hit him.

Brown was also shot four times in the right arm and once in his right eye. All of the bullets were fired into the front of his body.

"The bullets did not appear to have been shot from very close range because no gunpowder was present on his body. However, that determination could change if it turns out that there is gunshot residue on Mr. Brown's clothing, to which Dr. Baden did not have access," The New York Times reported.

After conducting the autopsy, Dr. Baden criticized the Ferguson police department for withholding information about Brown's death in spite of the public outcry and string of protesters from angry community members demanding justice for the African-American teen. Police say Brown was shot because he reached for the officer's weapon, but several witnesses say Brown was shot execution style while he was trying to surrender.

"People have been asking, 'How many times was he shot?' This information could have been released on day one," said Dr. Baden, the former host of HBO's "Autopsy." "They don't do that, even as feelings built up among the citizenry that there was a cover-up. We are hoping to alleviate that."

Attorney General Eric Holder announced Sunday that the Department of Justice will also conduct an autopsy, in addition to the one performed by local officials and the private one because of "the extraordinary circumstances involved in this case and at the request of the Brown family," a DOJ spokesman said.

Benjamin Crum, the lawyer representing Brown's family, said that the autopsy "verifies the worst that the family thinks happened -- that he was executed," reports USA Today. "It confirms what the witnesses said, that this was an execution. That's what the witnesses said from day one."

"The sheer number of bullets and the way they were scattered all over his body showed this police officer had a brazen disregard for the very people he was supposed to protect in that community," Crump said. "We want to make sure people understand what this case is about: This case is about a police officer executing a young unarmed man in broad daylight."