TAMPA, Fla. — The jailhouse death of a fire captain accused of possessing child pornography is under investigation.

According to the Hillsborough County Sheriff’s Office, Marshall Nelson, 52, was found in the jail hanging from a bedsheet on Tuesday.

Deputies began life-saving efforts before Nelson was rushed to an area hospital.

Nelson was pronounced dead the following day. The Medical Examiner's Office will determine his cause of death.

Nelson had been at Falkenburg Road Jail since his arrest on January 30 of this year. He was facing 100 counts of possession of child pornography.

An investigation is ongoing.