Detectives with the Kern County Sheriff's Department were sent to the Lerdo Pre-Trial facility in regards to a suspicious death.At 8 a.m., the KCSD said 39-year-old Yusuf H. Dean was let out of his cell to go into the day area, that also had access to the shower.At about 9 a.m., Dean had been ordered back into his cell so his cell door could be closed, however the inmate did not return to his cell.According to detectives, a short time later, Dean was found unresponsive in the shower area of the facility. He was fully clothed without the water on.Public Information Officer Ray Pruitt said Dean was part of a special prison section that required him to be alone.Dean did not have any obvious signs of trauma to his body, the KCSD reported.At the time he was found, detectives said he was the only inmate in that area of the jail out of his cell, and no other inmates had access to the day area or shower area while the inmate was out of his cell.An autopsy performed Friday revealed Dean died from Multiple Occlusive Pulmonary Thromboemboli due to a Deep Vein Thrombosis. The death was determined to be from natural causes.The Lerdo Pre-Trial Facility is located about 25 minutes or 14 miles northwest of Bakersfield.It is the largest detention facility operated by the Kern County Sherrif's Office, with a maximum capacity of 1,232 inmates. Pre-Trial houses both male and female inmates.In addition to providing housing for county inmates, the Kern County Sheriff's Office is in contract with other state and federal agencies to house their inmates. These inmates are predominantly housed at the Pre-Trial Facility.