Butler was taken into Harris County custody the day before his death. Investigations are underway to determine what caused a man's death while he was in custody at the Harris County Jail. Harris County inmate death investigationsWhat we know:Harris County officials say 49-year-old Karlos Butler was pronounced deceased on Wednesday, Aug. 5, shortly after 4 p.m. According to officials, Butler collapsed in the Harris County Joint Processing Center at around 3 p.m. on Wednesday. What we don't know:Butler's cause of death will be determined by an autopsy from the Harris County Institute of Forensic Sciences.