The motion says there was insufficient evidence presented to the grand jury to establish probable cause; the state impaired the integrity of grand jury proceedings; and the court lacks jurisdiction.
Prosecutors say Hernandez killed Daniel de Abreu and Safiro Furtado after a chance encounter at a nightclub. They say after de Abreu accidentally bumped into Hernandez, Hernandez followed the men in a Toyota 4Runner, pulled up to their car and opened fire.
Hernandez is serving a life sentence for the unconnected 2013 killing of Odin Lloyd.
The defense motions were filed last month. A spokesman for the Suffolk district attorney said Monday that prosecutors haven't yet filed their response.