Aaron Hernandez, the former New England Patriot and convicted killer, faces a new charge he intimidated a witness to a 2012 double murder. Hernandez, currently serving life in prison for the 2013 murder of Odin Lloyd, allegedly shot the witness to the murders of Daniel de Abreu and Safrio Furtago in Boston, NBC affiliate WVIT reported.

Hernandez was charged with witness intimidation Monday, a spokesman for the Suffolk County District Attorney’s Office said.

The witness was Hartford resident and former Hernandez associate Alexander Bradley, who sued the former Patriot in civil court. Bradley was also a witness for the prosecution in the Lloyd case. He accused Hernandez of shooting him in the face and leaving him to die in Riviera Beach, Florida, on Feb. 13, 2013. Although the shooting took place outside Massachusetts where Hernandez was convicted of murder, the Suffolk District Attorney's Office spokesman said he can be prosecuted in Boston because he showed intent to impede a criminal investigation.

The charge carries a maximum sentence of 10 years in prison. Hernandez was previously indicted on several charges in the double murder. He faced two counts of first-degree murder and three counts of armed assault, as well as a single count of assault and battery with a dangerous weapon and one count of unlawful possession of a firearm.

After his conviction in the Lloyd case April 15, Hernandez was remanded to the Massachusetts Correctional Institution-Cedar Junction in Walpole, Massachusetts. Last month, the convicted killer was placed on suicide watch and isolated from other inmates, several reports indicated.

A jury convicted Hernandez on first-degree murder and several gun-related charges in the 2013 shooting death of Lloyd, a semi-pro football player and landscaper. Ernest Wallace and Carlos Ortiz, accused of being accessories, face separate charges related to Lloyd’s death.