State law enforcement department investigating inmate death

This morning at about 9:31 a.m., detention deputies at the Flagler County jail discovered the body of an inmate against a cell door, the victim of an apparent suicide. The jail was immediately placed on lockdown while onsite medical staff assisted officers performing CPR until Flagler County Fire Rescue could arrive.

At one point, a sheriff’s spokesman told Historic City News that staff used an automated external defibrillator in an attempt to revive the inmate; 72-year-old Mark Terrance Klos, who lived at 340 Palm Drive in Flagler Beach. By the time advanced emergency medical personnel arrived, Klos was pronounced dead.

“It is tragic anytime someone takes their life,” Sheriff Rick Staly said. “We have many services available to our inmates, including mental health services through Stewart-Marchman-Act Behavioral Healthcare. We extend our condolences to his family.”

Sheriff Staly

Sheriff Staly responded to the jail and ordered an internal investigation; however, he requested the Florida Department of Law Enforcement to investigate the death.

Klos was arrested by the Flagler County Sheriff’s Office on the evening of Thursday, September 27. He was awaiting trial, without bond, on charges of making written threats to kill or injure another.

All inmates are screened for medical and mental health upon being booked into the jail. There was no apparent foul play or suspicious circumstances surrounding the death according to the department’s public information officer.


Fellow inmates and detention deputies foiled the last known attempted suicide by an inmate at the Detention Center on February 12, 2018.

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