There was an additional suspected drug overdose at the D.C. Jail on Thursday, May 19, a spokesperson for D.C.’s Department of Corrections confirmed on Wednesday. A person detained at the jail was given naloxone (commonly known by the brand name Narcan), a medication that reverses opioid overdoses, and then treated at a local hospital before returning to the facility, the spokesperson said. That incident brings the total number of suspected drug overdoses at the facility that week to three.

The incident occurred days after two additional jail residents suffered suspected drug overdoses on Sunday, May 15 — including one resident who died. 37-year-old Sean Lee was found unresponsive in his cell that afternoon and pronounced dead 30 minutes later. DOC employees also found his cellmate in medical distress at the same time, but he survived after being administered CPR and a dose of naloxone.

Just days before those incidents, an additional jail resident, 28-year-old Ramone O’Neal, died of unknown causes on Friday, May 13.

The Office of the Chief Medical Examiner could not confirm the cause of death for either O’Neal or Lee. A spokesperson for the agency says their process for determining and disclosing cause of death typically takes about 90 days. In both cases, DOC said, there were no signs of trauma and there was no evidence pointing to suicide as a cause. DOC and OCME also could not confirm which specific substances were involved in the suspected overdoses.

The DOC spokesperson said the four incidents, all of which happened in the span of a week, remain under investigation. They have led D.C.’s Department of Corrections to increase its facility-wide searches for contraband, use its K9 unit to search for banned substances, and increase drug education for people detained at the jail, the spokesperson said.

The spokesperson also said DOC is looking into using a third-party security firm to enhance entry screening at the D.C. Jail and “assessing additional technologies” for narcotic detection.

All of the incidents happened in the Central Detention Facility, the higher-security side of the D.C. Jail. The DOC spokesperson said they could not disclose which units the incidents happened on for security reasons.

The additional overdose comes amid ongoing and longstanding concerns about conditions at the D.C. Jail — including but not limited to the presence of drugs in the facility.

A D.C. Corrections officer was arrested in February for allegedly smuggling knives, drugs, and cellphones into the jail in exchange for money. A status hearing in that case is scheduled for Friday.

Concerns about drug use in the jail also were part of a litany of complaints highlighted in a memo the U.S. Marshals Service issued last year after it conducted a surprise inspection of the jail. (The Marshals Service has custody of some people held in the jail, including people who are awaiting court appearances in federal cases, people who are awaiting assignments to federal prisons after sentencing, and people who are in the D.C. Jail as they go through certain legal processes or make court appearances.)

The memo said that it appeared people detained at the jail were being denied food and water “for punitive reasons.” (DOC has denied this assertion). It also described an overpowering smell of urine and feces in the jail, caused by large amounts of standing human sewage in the toilets of multiple occupied cells, and said that residents of the jail were being served cold and congealed meals. People detained at the jail, advocates, and public defenders have said repeatedly that the Marshals Service memo highlighted deplorable conditions they had experienced or heard about for years.