Do you feel the ball was dropped on the mental health issues of the gunman that shot 5 people at the airport in Ft. Lauderdale, Florida?

Apparently news stories are saying he went to the FBI in Alaska and said he was being forced to watch videos of the Taliban. He also had a gun. They had him evaluated for 4 days, released him and gave him back his gun. Should they have kept him on their radar, put him on the no fly list?
Or should his family done more to help him? How and where does this kind of thing stop?