Two brothers who run a towing company the St. Louis Police Department likes to use have pleaded guilty to federal tax evasion charges. Brothers William and Kenneth Bialczak have confessed to skimming about a million dollars in cash from their businesses in 2005 and 2006.

The brothers admit they had combined incomes of about $2.5 million dollars. But they filed returns showing total income of about $1 million less than that.

They’ll be sentenced later.