Lil Wayne + Li'l DNA = Long Prison Term?

"Lollipop" rapper turns up for a hearing today in his criminal weapons case involving DNA evidence

If the devil is in the details, then Lil Wayne may be in a lot of trouble.

The "Hot Revolver" rapper turned up in a Manhattan courtroom today for a hearing in his gun case centering around a bit of DNA that could end up being the key piece of evidence determining his guilt or innocence.

The 27-year-old Wayne, real name Dwayne Carter III, was arrested in 2007 after police raided his tour bus following a concert and found a loaded .40-caliber pistol.

The New Orleans MC was subsequently charged with one count of criminal weapons possession and one count of criminal possession of a loaded weapon, both carrying a maximum 15-year prison sentence. He has since pleaded not guilty.

Today's proceeding focused on a minuscule amount of DNA investigators collected from the crime scene that may link Weezy to the firearm.

"They started Frye hearings regarding the DNA sample taken from the gun. It is a discussion about [scientific] evidence and the evidence being discussed is a sample of DNA," Manhattan District Attorney's Office spokeswoman Tracy Golden explains to E! News.

Wayne's defense attorney, Stacey Richman, is expected to dispute prosecutors' assertions that the profiling system, which is based on a low copy number, is accepted by the scientific community.

The hip-hopster declined to talk to reporters outside the courtroom. The hearing is scheduled to resume tomorrow.

But that's not the only legal rap he's gotten himself into. Lil' Wayne is due to stand trial next March in Yuma, Ariz., on separate felony drug and weapons charges stemming from a January 2008 bust along the U.S.-Mexican border.