Illinois Democrat David Hoffman, who investigated wrongdoing in government as Chicago’s inspector general, is making plans to run for the Senate in 2010.

Hoffman, who also is a former federal prosecutor, will be emphasizing his anti-corruption credentials as he seeks a Senate seat, currently held by retiring Democrat Roland W. Burris, that ousted Democratic Gov. Rod R. Blagojevich allegedly tried to sell for personal and political enrichment.

“More than anything, I’ve been an independent advocate for the people, and that’s exactly what I’ll be if elected to serve you in Washington,” Hoffman said in a video on his campaign Web site.