THURSDAY, 4:15PM ET UPDATE: Nikolas Cruz withdrew his not guilty plea Thursday and instead chose to "stand mute," according to a court motion.
The Cox Media Group National Content Desk contributed to this report.
The panel charged the 19-year-old with 17 counts of premeditated first-degree murder and 17 counts of attempted first-degree murder in the mass shooting at the Parkland high school that left 14 students and three adults dead.
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