A former New Haven bankruptcy attorney pleaded guilty Wednesday in U.S. District Court for embezzling more than $3 million from clients.

Peter Ressler, 70, a former partner with Groob, Ressler & Mulqueen in New Haven, pleaded guilty before senior U.S. District Judge Alfred V. Covello to one count of wire fraud, two counts of embezzlement from a bankruptcy estate and one count of bankruptcy fraud. Groob, Ressler & Mulqueen had been in business since 1952, and touted itself as one of the state’s oldest bankruptcy law firms.