The official from one branch of government will accuse the other branch of lies and deceit.
Smith is the legislator from Chicago's West Side who is infamous for being indicted early in his first term.
Then Smith was thrown out of the General Assembly, only to be reelected by the voters in November 2012.
As of Wednesday evening, Smith and his attorneys are preparing for a legal rebound as well.
At the court hearing, they will begin arguing the guts of their defense in an effort to get key evidence thrown out.
They will say that prosecutors lied about their key witness and then tried to cover it.
Smith contends that he was set up by an unreliable, anonymous and paid government informant.
According to court records on file Wednesday, Smith's attorneys will argue that prosecutors made misrepresentations to the court about the informant's background.
Smith is charged with accepting a $7,000 bribe and is heard on tape demanding it in cash so there would be no trace of the money, according to prosecutors.
Much of the initial complaint relied on secretly recorded conversations Smith had with the unnamed informant.
The trial in front of Judge Sharon Johnson Coleman is not scheduled until the fall but when she convenes Thursday's hearing, prosecutors will try to talk down Smith's contention of a faulty case.
According to new government filings, prosecutors admit having put forth two inaccurate statements by the informant but say that the undercover recordings of the defendant's own words and deeds are proof of bribery and they don't rely on the informant.