Attorney General Eric Holder on Sunday ordered a second autopsy of Michael Brown, the unarmed teenager who was shot and killed by a police officer in Ferguson, Mo. last week.

The autopsy will be conducted by a federal medical examiner, as a result of a direct request by Brown's family members who said they didn't trust the results. Although the state autopsy ruled that Brown had died from gunshot wounds, the report did not specify how many times he was shot nor did it include information about points of bullet entry, which would provide more information in the investigation. 

David Weinstein, a former federal prosecutor who supervised the criminal civil rights section of Miami's U.S. Attorney's office, told the AP that a federally conducted autopsy "more closely focused on entry point of projectiles, defensive wounds and bruises" would likely assist the investigation.

"This independent examination will take place as soon as possible," Department of Justice spokesman Brian Fallon said in a statement. "Even after it is complete, Justice Department officials still plan to take the state-performed autopsy into account in the course of their investigation."

The family of Michael Brown has postponed funeral arrangements so the autopsy could be performed