Attorneys for former NFL star Aaron Hernandez are seeking to have additional double murder charges against their client dropped, though he is already serving a life sentence without the possibility of parole.

According to the Associated Press, a hearing is scheduled for Tuesday in the Suffolk Superior Court on a motion raised by lawyers for the onetime New England Patriots tight end to dismiss the charges.

The 25-year-old Hernandez is accused of gunning down Safiro Furtado and Daniel de Abreu outside a downtown Boston nightclub, after de Abreu allegedly spilled a drink on him and failed to apologize.

In their filing, Hernandez's high-powered team of attorneys insist insufficient evidence was presented to the grand jury to show probable cause in the widely followed proceedings.

In addition, the defense is also expected to argue that evidence seized from the SUV Hernandez was allegedly driving that night should be inadmissible because investigators obtained it based on statements from a lie-detector test on a witness who later failed a polygraph test.

After being convicted earlier this year as the trigger-man in the June 2013 execution-style slaying of former associate Odin Lloyd, Hernandez is currently being held at the Souza-Barnowoski maximum security prison.

His attorneys have also filed several motions in that case, seeking to have the verdict overturned on grounds ranging from jury misconduct to claims the verdict was based on "improper speculation, conjecture and guesswork."

More recently, attorneys argued before Judge E. Susan Garsh that insufficient evidence was presented to jurors to convict him of "extreme atrocity or cruelty'' in the Lloyd killing as required by state law.

Prosecutors have long theorized part of Hernandez's motive for killing Lloyd was the victim's knowledge of other violent crimes committed by the former NFL star.