It is a difficult case for investigators and it is not clear what charges they will be able to bring.
Investigators struggled for weeks to make a federal murder case in Seeknik’s death, as they leaked on video and photographs to determine the moment he suffered his fatal injuries. Investigators have determined that initial reports suggest that it was not true that Signik was struck by a fire extinguisher, CNN reported earlier.
Some have been charged with assaulting police officers in the weeks following the attack, but no one has yet been arrested in connection with the coin. More than 100 other police officers were injured in the melee last month, which required at least 15 people to be hospitalized, according to court documents.
This story has been updated with background information.
David Shortle of CNN contributed to this report.
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