Central jail in downtown San Diego
The central jail on Front Street in downtown San Diego. Photo by Chris Stone

An autopsy Sunday failed to pinpoint the reason a 57- year-old inmate at the San Diego Central Jail died during breakfast after complaining of pain.

The death occurred about 4:30 a.m. Saturday, according to San Diego police Lt. Thomas Seiver.

Robert Dwayne Moniger told deputies he was not feeling well and they contacted medical staff to have him assessed, Seiver said. “Within minutes, Moniger became unresponsive.”

Deputies and medics performed lifesaving measures until San Diego Fire-Rescue paramedics arrived and Moniger was pronounced dead, the lieutenant said.

The cause and manner of Moniger’s death will await results of lab tests and further evaluation by the Medical Examiner’s Office, Siever said.

Moniger was booked into the jail Oct. 22 for felony vandalism, Seiver said.