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WATERLOO, Iowa (AP) — A former Waterloo teacher accused of stealing money from the teachers union has pleaded guilty.

The Waterloo-Cedar Falls Courier reported that Anthony Dehl entered the plea Tuesday in U.S. District Court in Cedar Rapids. The charge: wire fraud. It carries a maximum prison sentence of 20 years. His sentencing date has not yet been set.

Prosecutors said Dehl took more than $54,000 from the union’s accounts over about five years, when he was the union’s treasurer. Dehl made unauthorized wire transfers and cash withdrawals from the accounts, debit card purchases and made out checks to cash. He spent some of it on gambling, authorities said.

Dehl retired from Waterloo Community Schools last year after more than 30 years in the profession.