Mississippi teen Carly Gregg was severely depressed and possibly hearing voices when she allegedly gunned down her own mother, psychiatrists testified at her trial Thursday — but one argued she committed a “diabolical” act that keeps her from meeting the requirements of an insanity defense.

I don't know that it was her room and Carly can be seen on the Wise video because it's kind of moving back and forth, touching her face, touching her hair, seems *** little frustrated, anxious. Um And so I go through that all that video,