A native Indian tribe in the United States has found itself in a bit of hot water that could cost it a serious amount of cash. According to an external audit conducted of a casino operated by the St. Croix Chippewa Indians in Wisconsin, $1.5 million in casino revenue may have been misappropriated for personal use, misused or improperly registered. If the audit findings are confirmed, the tribe could be on the hook for as much as $27 million.

A Notice of Violation (NOV) (in pdf) was issued by the National Indian Gaming Commission (NIGC) on April 11. It accused the tribe of 527 infractions against the Indian Gaming Regulatory Act, as well as other laws, between 2014 and 2017. Each violation carries a fine of as much as $52,596.

This is just the top of the iceberg for the tribe, though. It will most likely face a federal inquiry now that could be led by law enforcement officials and tax authorities.

Rory Dilweg, a lawyer with Berg Hill Greenleaf Ruscitti out of Colorado, told Casino.org, “This is the longest — 29 pages — NOV, with the most alleged violations — 527 — I have ever seen.” Dilweg is the former chief counsel of Wisconsin’s Oneida Tribe of Indians.