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Henrico County officials said that one patient was taken to VCU Medical Center via helicopter and four ambulances took the others to the hospital.
Documents from Parker's arrest indicate that the man smelled of alcohol and had dilated eyes when he was approached by authorities on the north bank of the river the night of the accident.
The Virginia Department of Game and Inland Fisheries said that the injuries to the passengers on board the boat were not considered life threatening, reports The Associated Press.
Parker appeared in Henrico General District Court with a cast on his right wrist.