Though he's in jail, Aaron Hernandez is continuing to find ways to get into trouble.
TMZ has a report that states Hernandez is being investigated for an incident that occurred late last year in which he allegedly threatened to shoot and kill a guard at the Bristol County Jail.
According to the report, investigators met with another inmate to discuss whether or not the inmate heard Hernandez threaten to kill the guard and the guard's family once Hernandez was released from behind bars. The inmate was also reportedly asked if he ever heard Hernandez direct noises at the guard that sounded like a machine gun.
Hernandez is already facing assault charges after he was involved in an altercation with another inmate back in February. He was placed in isolation for 30 days following the incident.