ST27, Osbon had been undergoing psychiatric evaluation at the Northwest Texas Hospital in Amarillo. It would seem the results of those hospital evaluations were sufficient to now transfer him into a Federal (Bureau of Prisons) medical center for a more extensive psychiatric evaluation. This suggests there was not an underlying neurological or physiological condition that suddenly precipitated his behavior, nor was the onset caused by his taking supplements to boost energy, lose weight, enhance performance, etc.
These initial psychiatric evaluations may also indicate he poses a continuing risk of harm to himself and/or others, and thus no release on bond.
A description of psychiatric evaluations done at the Federal medical center at Devens Massachusetts (outside of Boston) can be found here.
http://www.bop.gov/jobs/students/cpdipdev2.pdf
Look for sections on forensic evaluation.