Action News has also learned that, because of safety concerns, Troutman's hearing will be done via video from the Montgomery County Prison.
Troutman is accused of killing Skyler Kauffman, who lived at the same apartment complex.
Lawyer Craig Penglase told the Associated Press on Thursday that plans to explore mental-health issues as he defends Troutman
He says Troutman may have the social disorder Asperger's syndrome, but will also be tested for mental illness.
He says Asperger's alone wouldn't prevent him from knowing right from wrong, the standard for an insanity defense in Pennsylvania.
Penglase previously won an insanity defense for a woman accused of trying to kill her newborn. She got probation.
Penglase also said that Troutman was "confused" and "sad" over his arrest in the girl's death.