Unfortunately this is not enough information to make an inteligent guess and doesnt show a disposition. Even in dismissed cased it shows the disposition on the FBI report.
So to be clear he was arrested, charged, held in the mental health facility and not the jail? then released from the mental health facility? The precinct/procecuter could have dropped the charges IF they deem it to be a mental health crises and not a crime but the charges do not appear to support that assumption. It appears that this is a case that has not yet been ajudicated so you/he can order the official police report to get some clarity but the courts may not have anything further at this point.