So instead of being mentally ill, he was ISIS in the first place. It seems to me that if one is downloading ISIS video and is also mentally ill, it might be a good idea to keep an eye on him. Obviously they don’t think a person can be both..........
http://miami.cbslocal.com/2017/01/06/sen-bill-nelson-identifies-suspected-fll-gunman/
Law enforcement said he was found with an active military ID and is an American citizen, born in New Jersey. Previous known addresses include Penuelas, Puerto Rico and Anchorage, Alaska.
They add that in November 2016, he walked into an FBI office in Anchorage claiming that he was being forced to fight for ISIS. He was sent to a psychiatric hospital.
In 2011 or 2012, he was investigated by Homeland Security Investigations for child porn. Three weapons and a computer were seized, but there was not enough evidence to prosecute, according to law enforcement sources.