According to the U.S. Attorney's Office, Tommy Manzo hoped the attack would leave Dina's then-boyfriend with "a permanent facial scar."
UPDATE 2:45pm PT on 7/1/20
Speaking with EXTRA, Dina's sister Caroline Manzo -- who's married to Tommy's brother -- said "We are heartbroken. This is family on both sides. I want to know the truth and my allegiance will lie with the truth."
She added, "We don’t run from things like this, we address them, and I feel comfortable with that because we are being painted with a brush that does not reflect who we are as people."
update 2:00pm pt 6/30/20
Tommy Manzo pled not guilty on Tuesday to charges he hired a mobster to beat up her ex-wife's current husband. His lawyer also told Page Six that his client is "absolutely innocent, and the allegations more resemble a fictionalized plot of a reality TV show and will be proven to be nothing more than that."
The Department of Justice release says the "wedding and reception, held in August 2015, were attended by approximately 330 people, and included many members of the Lucchese Crime Family."
According to the full indictment, Manzo was allegedly "upset that [Cantin] had an ongoing relationship with his former wife" and planned an assault which would "leave a permanent facial scar."
"In order to aid and assist in the commission of the violent assault, defendant THOMAS MANZO provided defendant JOHN PERNA and Accomplice- 1 with personal information about Victim- 1 to enable them locate Victim-1's residence, business addresses and vehicle so that they could assault him," the indictment adds.
"On or about July 18, 2015, based upon information provided by defendant THOMAS MANZO, defendant JOHN PERNA and Accomplice-1 located Victim- 1 and his vehicle and eventually followed Victim- 1 to a strip mall in Passaic County, New Jersey," it continues. "At the strip mall, defendant JOHN PERNA and Accomplice-1 attacked Victim-1 in the parking Iot. Defendant JOHN PERNA used a dangerous weapon, namely a slap jack, with the intent to inflict serious permanent injury on Victim- 1."
Both Manzo and Perna are charged with committing a violent crime in aid of racketeering activity and conspiracy to commit a violent crime in aid of racketeering activity. Manzo is also charged with falsifying and concealing records related to the federal investigation into the alleged attack.
According to the DoJ, Manzo was subpoenaed to turn over documents related to the Perna wedding. They claim he "submitted a false document regarding the reception to the government, along with a false certification."
They face up to 20 years in prison and a $250,000 fine for the racketeering charge alone.
Dina appeared on RHONJ until 2015, before moving to California with Cantin, who she met the same year. She married Cantin in 2017.
Tommy's brother, Albert, is married to fellow former "Housewives" star Caroline Manzo and co-owns Brownstone Restaurant.