The new charges detail a portion of the events that the brothers were involved in.
According to the charges, Fitzgerald and Mattison placed bets totaling more than $48,000 on behalf of 81 people in three weeks.
Fitzgerald also received $65,103.50 in CashApp and Venmo payments from October to December 2022, prosecutors said.
Bettors received roughly one-third of their money in winnings or refunds, the latter if the men did not wager their entire deposit before leaving the casinos.
Fitzgerald considered the payments “donations” or “deposits.”
When news of the investigation first broke in January, Minnesota Alcohol and Gambling Enforcement Division spokesperson Nicole Roddy said that the case was the first of its kind for the agency.
The American Gaming Association also said that it had not heard of such a situation, and the group’s vice president for government relations, Alex Costello, said the crimes went against casinos’ anti-money laundering rules.
Fitzgerald live-streamed himself on January 12 discussing being removed from the Mystic Lake Casino during an earlier visit. Later that day, he told his followers that he was permanently banned from Treasure Island.
Fitzgerald is due to appear in court on Wednesday. Mattison will appear on Thursday.