A man died at the D.C. Jail on Saturday after being found unresponsive in his cell. The jail resident, 63-year-old Giles Warrick, is the eighth person to die in custody of the D.C. Department of Corrections this year.

D.C.’s Department of Corrections confirmed the death in a press release.

Warrick was being held at the jail awaiting trial for a series of violent crimes in the 1990s, including multiple sexual assaults and the 1998 rape and murder of 29-year-old Christine Mirzayan. Often referred to as the alleged “Potomac River Rapist,” he was arrested in South Carolina in 2019 after police used DNA evidence to link him to the crimes. Warrick’s trial was set to begin on November 30, according to the Washington Post.

A Metropolitan Police Department incident report says that staff found Warrick hanged in his cell during a routine check. Jail staff found Warrick unresponsive shortly after 8 a.m., according to DOC. Staff attempted life saving measures, the department says. First responders arrived at 8:26 a.m. and pronounced Warrick dead. DOC says it’s investigating the incident, and the Office of the Chief Medical Examiner will be conducting an autopsy to officially determine his cause of death.

“Our condolences are with Mr. Warrick’s family during this difficult time,” the DOC said in the press release.

Seven other people have died in DOC custody this year. They include Treyvon Littles and Giovanni Love, whose families are both still demanding answers about the circumstances surrounding their deaths. The medical examiner’s office has yet to determine a cause of death for Littles, and his mother says the family has been given little information about what led to her son’s death. Love’s death was ruled a suicide by hanging. The other deaths this year were from causes ranging from homicide to heart disease. Two of the deaths were accidental overdoses, according to D.C. officials.

In the case of each of the deaths at the jail this year before Warrick’s, DOC did not publish any kind of official notice or press release. The department only publicly disclosed details about deaths in response to inquiries from reporters and others. After inquiries from DCist/WAMU about deaths at the jail, DOC officials said they would change their policy and start proactively disclosing in-custody deaths.

The department appears to be following the new policy now; The press release announcing Warrick’s death was the first time D.C.’s Department of Corrections has proactively issued a public statement about the death of a resident at the facility this year.