Hernandez's arraignment is scheduled for Thursday in a Boston courtroom. He was convicted last month in the 2013 murder of Odin Lloyd, who was dating his fiancee's sister.
It will be Hernandez's first court appearance since he was sentenced the day of his conviction to life in prison without parole.
The former star tight end also faces two murder counts in Boston in a 2012 double slaying that prosecutors say happened after a drink was spilled in a nightclub. Hernandez was indicted this month on a witness intimidation charge related to those killings.
Prosecutors say Hernandez shot the witness in February 2013 in Florida after he made a remark about the killings. The witness lost an eye.
Prosecutors haven't identified the man, but it's clear from earlier court proceedings it's his former friend, Alexander Bradley.
In a separate hearing Thursday, Lloyd's mother, Ursula Ward, is due to go before a judge in New Bedford to ask for a preliminary injunction barring the sale of Hernandez's Hummer. Ward has sued Hernandez, and her lawyers have been trying to track down his assets. The Hummer turned up for sale in a used car lot this month.