More investigation needed in fatal Cowboys crash

"We're not just looking at that victim's family," Harris said. "We're also looking to make sure we can speak for all the victims and potential victims here in Dallas County when we prosecute these cases."

Also Tuesday, police released tapes of two callers reporting an overturned vehicle Saturday morning. Both callers said smoke or fire appeared to be coming from the car. Police also released dash-cam video that shows the overturned vehicle at the crime scene. According to an arrest affidavit, officers who arrived found Brent pulling Brown from the wreck.

Brent was placed Wednesday on the reserve/non-football illness list by the Cowboys, which ends his season but keeps him on the team. He attended a memorial service for Brown earlier this week with teammates and Brown's family.

Coach Jason Garrett has declined to talk about specifics of the accident.

"There's going to be a lot of details that come out about exactly what happened and I don't think it's appropriate for me to stand up here and address the different things," Garrett said. "Again, we continue to support Josh ... in every way that we can and also at the same time help other people that are in a similar kind of situation."

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AP Sports Writer Schuyler Dixon contributed to this report.