"At the end of the day, facts are what we are looking for," Bell said. "It is hard to gather up information when the only source of information are the rumor mills."
He has asked Roper to conduct an investigation including the date and location. The mayor also said he wants to secure a copy of the video.
"I am giving the chief directions, and I expect him to carry out the directions," Bell said.
In 2009, the Police Department fired five officers in connection with another beating that was caught on video.
Two of those officers faced federal indictments and were exonerated. Three of those officers were never charged of criminal wrongdoing.
On Wednesday, a Jefferson County Personnel Board hearing officer recommended that those officers get their jobs back. The three-member personnel board will vote next month on that recommendation.
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