One of the D.C. Snipers, Lee Boyd Malvo, wants his ten life sentences in Virginia and Maryland thrown out.
Malvo and John Allen Muhammad shot 13 people, killing ten of them in the 2002 shooting spree that spanned from D.C. to Hanover on I-95.
He was just 17 during the shootings.
Malvo's attorneys argue a 2013 Supreme Court decision says mandatory life sentences without parole for minors are cruel and unusual punishment.
Malvo is currently serving two life sentences at the Red Onion State Prison.