Attorneys for Eddie Ray Routh filed a motion, on Tuesday, for a new trial after Routh was found guilty in the murders of "American Sniper" author and former Navy SEAL Chris Kyle and his friend Chad Littlefield.
Routh's attorney Wendy St. John also filed an appeal to overturn his conviction on Feb. 24.
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No date has been set to hear either motion filed Tuesday.
Because the state did not seek the death penalty, Routh, 27, received an automatic life sentence without the possibility of parole.
Routh’s defense claimed he was insane at the time of the crime and unable to tell right from wrong. Experts testifying for the state said former US Marine Routh did not have post-traumatic stress as he claimed in the past because they never saw combat and did not have suffer serious trauma.