Aaron Hernandez called his former boss, New England Patriots owner Robert Kraft, "fake" and "non loyal" in a jailhouse letter.

According to TMZ, Hernandez sent the note in early December from his jail cell at the Souza-Baranowski maximum security prison to a female pen pal he had previously exchanged letters with.

After first attacking the woman herself in the letter and graphically suggesting that she take her own life, Hernandez moved on to talk about his former team. The NFL star said he had a TV in his cell and still followed the Patriots.

"And yes, I still root for my squad and still love all the ones I loved," he wrote. "The closest I was with was probably Brady and whom I love to death and always will and only hope the best for them."

He then took a swing at Kraft, writing, "Fake *ss non loyal Kraft who told me he loved me every time he seen me but obviously shows his word ain't sh*t." 

Hernandez added that, no matter what comes of him, he will continue to root for the Patriots and the ex-teammates he still has love for.

"I watch every game faithfully cheering them on and always will cuz I have love for so many of them," he added.

The 26-year-old, once an emerging star on the team, is now being at held at Baranowski on a lifetime sentence without the possibility of parole. He was convicted in the 2013, execution style killing of former associate Odin Lloyd.

Hernandez is now also awaiting trial on murder charges in the 2012 shooting deaths of Safiro Furtado and Daniel de Abreu. CBS has reported both men were gunned down in a drive-by slaying outside a downtown Boston nightclub. Hernandez has pleaded not guilty in that case and is expected to go to trial sometime later this year.