In this Jan. 9, 2017, file photo, Esteban Santiago is...

In this Jan. 9, 2017, file photo, Esteban Santiago is taken from the Broward County main jail as he is transported to the federal courthouse in Fort Lauderdale, Fla. Credit: AP

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.

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