Former New Orleans city vendor Mark St. Pierre is reportedly negotiating with prosecutors to possibly testify against former mayor Ray Nagin in a case being built by U.S. Attorney Jim Letten’s office, according to WWL-TV.

St. Pierre was previously convicted of bribing members of Nagin's administration and given a 17-and-a-half year prison sentence.

The WWL-TV report says that sources close to St. Pierre and the Nagin probe say the former technology firm owner hopes to get his sentence reduced in exchange for testimony against the ex-mayor. If St. Pierre is really willing to admit his crimes, he could have key information about trips, parties and home care he provided for Nagin.

St. Pierre was reportedly transferred from a federal prison in Fort Worth, Texas, to a state lockup in St. Charles Parish, apparently so he could better help prosecutors.

U.S. marshals confirmed Wednesday that they have Meffert in the New Orleans area. And a U.S. Bureau of Prisons spokesman said the marshals transferred him out of Texas back on April 19th.

WWL-TV reports that documents and testimony at St. Pierre's trial showed he provided a yacht for a Nagin campaign party, yard work at Nagin's house and a credit card tha Meffert charged to fly Nagin and his family on exotic vacations to Hawaii and Jamaica and on a campaign trip to Chicago. In Chicago, St. Pierre hosted a campaign party and raised money for Nagin’s reelection.

Nagin has always said that he believed Meffert, his employee, was paying for those freebies, not a city vendor. At St. Pierre’s trial, Meffert testified that he never told the mayor that St. Pierre had paid for the Hawaii trip in December 2004.