Nickie Costello, 40, died in Harris County custody on Thursday, according to the Harris County Sheriff's Office. The office said he was pronounced dead shortly after 3:30 p.m. at St. Joseph Medical Center after suffering a medical emergency. Paramedics took him to the hospital.
Costello was being held on a capital murder charge in the deaths of his parents, David Morgan and Juanita Costello. Records show he was scheduled to appear in court in early December. His parents were found stabbed to death in October 2021 at the Northside home where the couple lived.
Costello's death has been reported to the Texas Commission on Jail Standards. The Texas Rangers are investigating. The sheriff's Internal Affairs Division will review whether all applicable policies and procedures were followed. His cause of death remains under investigation.