Clifton John Russell IV is charged with capital murder by terror threat or other felony in the death of "Mo" Ahmad.
Russell was 17 at the time of his arrest.
He's due back in court March 20 for a jury pre-trial and his trial date is now set for March 24 in 89th District Court.
Investigators say Russell admitted to entering Mo's Grocery on Iowa Park Rd. in January 2012 and fatally shooting Ahmad.
He says Michael Graves was his accomplice and served as a lookout at the front door while he went inside.
Graves is also charged with capital murder and will go to trial after Russell.
Court records show Graves will not have any more court hearings until Russell's case goes to trial because he is the alleged shooter.
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