Miles' mental state at the time of the August 2015 shooting has been in question over the course of the pre-trial proceedings.
Miles' attorney stated his client has a history of schizophrenia and psychotic episodes. The insanity defense was being explored, saying Miles didn't even remember the day of the murder.
Miles was transferred to a state mental facility after his arrest.
Last year, a judge found Miles incompetent to stand trial, but that was reversed earlier this year.
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