(MCT) — WASHINGTON — Jesse Jackson Jr., who resigned from Congress last week and acknowledged he was the subject of a federal investigation, could be eligible for an annual pension estimated at $45,000, but that benefit would be lost if he were convicted of one of several public corruption felonies.

Jackson, 47, a Chicago Democrat who served 17 years in Congress, remained out of sight Monday, five days after sending a resignation letter to House Speaker John Boehner, R-Ohio. A federal criminal investigation into Jackson’s alleged misuse of campaign dollars remains active, a source said Monday.