Employer takes a "tip credit" but doesn't make up the difference, misuses tip pooling, or assigns too much non-tipped work at the lower wage.
What can affect a case like this includes the gap between the tip-credit wage paid and the full minimum wage owed, how much time was spent on non-tipped "side work," whether tip pooling improperly included managers or kitchen staff, and your state's specific tip credit rules β several states don't allow a tip credit at all.