( CNN ) -- Aaron Hernandez , who already faces first-degree murder and weapons charges , could face even more trouble after a jailhouse fight last week . The Bristol County , Massachusetts , sheriff is asking that the former New England Patriots star face a simple assault-and-battery charge for allegedly punching a fellow inmate . Neither man was seriously injured . Sheriff Thomas Hodgson told CNN on Thursday the charge would be a misdemeanor . Hodgson said he filed a criminal complaint application with the Third District Court . Hernandez , 24 , is aware of the filing , he said . The case is now in the hands of the district magistrate , who will decide whether there is probable cause for a charge to move forward . If so , an arraignment will follow , Hodgson told CNN . An attorney for Hernandez did not immediately respond Thursday to a CNN message . Attorneys have not responded to questions about the February 25 fight involving an unidentified inmate . Hernandez discussed killing in jailhouse calls . Hodgson last month said that jail officials will be looking at how the two inmates came into contact , because `` no more than one inmate is supposed to be out at a time '' in the unit where Hernandez is housed . Hernandez has pleaded not guilty to the murder charge . Authorities have said that Hernandez and two other men picked up Odin Lloyd from his Boston apartment in a rental car shortly before Lloyd was found shot to death on June 17 . Surveillance cameras then captured the rental car leaving the crime scene and Hernandez carrying a gun as he returned to his home minutes later , according to authorities . Hernandez sued by families of 2012 fatal shooting victims . CNN 's Chris Boyette and Rande Iaboni contributed to this report .
Sheriff urges misdemeanor charges . The sheriff said the investigation is ongoing and that he has not yet decided whether to file charges. Neither man was seriously injured in the altercation . Former NFL star is being held on a first-degree murder charge in death of Odin Lloyd .