EAST PROVIDENCE, R.I. (CBS) – A New York Giants fan was so angry about the New England Patriots signing Antonio Brown he allegedly issued a threat on Facebook to “shoot up random people” at Gillette Stadium.

Tobias Gray was arrested at his home in East Providence, Rhode Island Sunday. He was handcuffed and wore a Giants jersey and jacket during a court appearance in Providence Monday on unrelated assault charges. The 44-year-old was charged with simple and domestic assault and threatening police officers at the time of his arrest.

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Gray is accused of making a threatening post on Facebook over the weekend after the defending Super Bowl champions signed Brown, one of the best and most controversial receivers in the NFL, Saturday.

In the post, Gray allegedly wrote “I’m going to pull a white boys school shooting at Foxboro you might as well 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.”

A screenshot of the post on Tobias Gray’s Facebook page before it was removed. (WBZ-TV graphic)

The Facebook post was deleted over the weekend. Gray’s attorney said his client was simply upset the Patriots were able to land Brown and did not mean any harm.

“He just really didn’t get into why, he’s a Giants fan apparently,” his attorney Stefanie DiMaio Larivee said outside court. “He was not happy about it as I can see online many, many fans of many other football teams were not happy about it.”

A judge in Providence called Gray’s record extensive. In the report from the Foxboro Police Department, it was discovered there were pictures of Gray holding guns on Facebook.

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Gray is being held until the charges in Foxboro are resolved. He’s charged with a fugitive of justice complaint for making terroristic threats in Massachusetts.

A neighbor told WBZ they often hear Gray arguing with his girlfriend. “Always fighting out here, always going crazy,” said Lucy Camara. “But I never thought he would do that.”

Foxboro Police issued a vague statement on Gray’s case Monday morning before Gray appeared in court.

Tobias Gray in Providence District Court, September 9, 2019. (Image credit: WPRI-TV)

“Chief (William) Baker has indicated that the Foxborough Police are withholding comment at this time on any specific action our agency may have taken, or may take in the future, in response to the ongoing challenge of malevolent or criminal social media posts,” police said. “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.”

Gray is expected to be arraigned in Wrentham District Court sometime this week.

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There has been no comment yet from the Patriots.