Ex-New England Patriots star Aaron Hernandez just took the witness stand for the first time in his high-profile murder case ... and told the court he's not mentally ill.
During the hearing, the judge peppered Hernandez with a barrage of questions about his overall health and mental state. Hernandez -- who was pretty composed on the stand -- insisted he's A-OK.
Hernandez has pled not guilty to the murder of 27-year-old Odin Lloyd.
If convicted ... Hernandez faces life in prison. When asked if he understood the gravity of the situation, Hernandez told the judge he got it.
'I'm Not Mentally Ill'
10/9/2013 12:06 PM PDT BY TMZ STAFF
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