Esteban Santiago walked into an FBI office in November confessing he thought his mind was being controlled, and he was sent for mental evaluation [“Gunman’s erratic behavior,” News, Jan. 13].

He was demoted by the National Guard for unsatisfactory performance, said he heard voices, and obviously received little assistance for what may have been undiagnosed post-traumatic stress disorder.

advertisement | advertise on newsday

How tragic that the lack of intervention left an opportunity for a mass shooting that left five people dead at Fort Lauder dale’s airport.

His gun was returned to him by police? He was not added to a no-fly list? He could have been helped more after the many obvious red flags and avoided becoming a crime statistic.

Marian Senatore, Lindenhurst