MIAMI AP – A former Swiss banker should get a sharply reduced prison term for helping the U.S. government as a star witness in a wide-ranging tax evasion investigation of banking giant UBS AG, federal prosecutors said Tuesday. The banker contends his cooperation warrants no jail time at all.

The motions filed in federal court come a week after U.S. and Swiss governments settled out of court to end an IRS lawsuit against UBS. Under that deal, the Swiss agreed to let UBS name at least some wealthy U.S. clients behind 52,000 accounts, information that had been protected by the country’s vaunted bank secrecy laws.