PROVIDENCE — An East Providence man is accused of threatening Gillette Stadium in reaction to the New England Patriots signing star wide receiver Antonio Brown, as well as a felony domestic assault.

Tobias Gray, 44, appeared in court Monday to face the charges, wearing a New York Giants jersey with a blue hoodie. He shook his head with dismay as he saw reporters taking photographs and video of him in court.

Gray’s lawyer, Stefanie DiMaio Larivee, said the charges stem from a Facebook post that was seen as threatening toward Gillette Stadium in Foxboro, where the Patriots opened their season on Sunday night.

She said that Gray did not mean the post to be serious and that he deleted it on his own initiative.

“Just like everybody else, he was reacting as a fan” to the Brown news, DiMaio Larivee said. “His opinion. Nothing that was said was ever meant to be in any seriousness.”

Gray waived extradition to Massachusetts, where he faces the charge from Foxboro police. He was set to post bail on the Rhode Island charges Monday, his lawyer said, and was looking forward to facing the Foxboro charge.

East Providence police said they went to arrest Gray on Sunday on the terroristic threats charge from Foxboro, as well as a warrant for simple domestic assault.

Those charges were amended to felony domestic assault Monday. The domestic incident occurred Sept. 3, police said.

While Gray was being processed, he threatened an officer, police said, leading to a felony charge of threatening a public official.

“I am going to find you, and watch what happens,” Gray told the officer, according to the Police Department. “F you, F your mother, F your kid. I will give your kid short-term memory loss. You’d better watch your back, watch when I find you, No. 87. Watch what happens. … I’m going to make it my life mission to find you and your kid. You’re going to wish you never met me.”

He was ordered to have no contact with the victim in the domestic assault case or the East Providence cop.

Several anti-Patriots and pro-Giants Facebook posts are still available on Gray’s page, including his use of the word “gay” to denigrate the Patriots. Gray is originally from Great Neck, New York, his page says.

“Just want to say touch my page with any giant comments. I will talk about your mother your kids and your dead grandmother,” he wrote in September 2015.

According to WJAR, a criminal complaint alleges Gray wrote the following on Facebook this past weekend: "I don't ever really post too many things so you know this is real since the Patriots signed Antonio Brown I'm going to pull a white boys school shooting at Foxboro you might as well just hand them the ring right now I'm if I ever get my hands on a gun which I don't have one yet but I'm looking I will go shoot up random people at Foxboro."

In a statement, Foxboro Police Chief William Baker said that the police would not comment on any action the department may have taken, or may take in the future, regarding the post. Police would not answer questions about the nature of the post.

"In general Chief Baker says the department will respond vigorously and in close collaboration with our local, state and federal partners to take appropriate action as the law allows," the statement says.

-With reports from staff writer Madeleine List