A suspect has been arrested following the carjacking of Rep. Mary Gay Scanlon (D-Pa.) in South Philadelphia on Wednesday afternoon, the U.S. Attorney’s Office for the Eastern District of Pennsylvania announced on Dec. 23. Officials arrested Josiah Brown, 19, of Wilmington, Delaware, on Thursday on charges of carjacking and carrying and using a firearm in connection with the armed carjacking. Brown appeared in federal magistrate court in Philadelphia on Thursday afternoon and is currently being detained by authorities. Police were able to track Scanlon’s car to New Castle, Del., where they arrested five people who approached the parked vehicle in the parking lot of the Christiana Fashion Center. Brown was among the five people and was in possession of the keys to Scanlon’s vehicle, officials said. Attorney Jennifer Arbittier Williams said in a statement that the investigation was “in its very initial stages” and that officials would “evaluate charging decisions.” “Armed carjacking is a serious federal crime. There have been a rash of violent crimes like this …