According to the FBI, a woman’s escape from a cinder block jail may have saved others from a similar ordeal.

A woman in southern Oregon rescued herself from her kidnapper by fatally shooting him after being held captive in a cinder block cell at a residence. She has also helped safeguard other women from potential sexual violence by alerting authorities to a suspicious man with allegations of sexual assault in at least four states, according to the FBI.

Nehasi Joubert, who worked as an undercover police officer, was revealed as the suspect when she abducted a woman in Seattle three weeks ago, then drove several miles to her residence in Klamath Falls and held her captive in a garage cell, the FBI said on Wednesday.

Joubert, 29, is facing federal charges including interstate kidnapping and the authorities say they are looking for other potential victims after linking her to other assaults. They have not disclosed in which states these attacks occurred.

Stephanie Shark, an assistant special agent at the FBI’s Portland field office, said in a press release, “She was kidnapped, bound with chains, sexually assaulted, and held in a cinder block cell.” “Police say she was bleeding from her hands as she tried to break free from the door until they were covered in blood. Her quick thinking and desire to survive may have saved other women from similar nightmares.”

After fleeing Joubert’s residence in Klamath Falls, the suspect was tracked and arrested by state police in Reno the next day, according to the FBI.

Heder Freely, a lawyer at the Federal Public Defender’s Office in Las Vegas, who was listed as Joubert’s attorney, declined to comment on the case when reached on Wednesday, as he is still representing her in Nevada. Joubert has not yet been appointed a public defender in Oregon as she is being extradited from Nevada, which may take a few weeks, said Kevin Sonof, spokesman for the U.S. Attorney’s Office in Oregon.

A grand jury in Portland indicted Joubert on Wednesday for interstate kidnapping and engaging in criminal sexual activity, as well as an allegation of national line transportation in connection with a complaint.

According to the federal complaint filed in Oregon’s U.S. District Court, Joubert requested the adult victim, identified as Jane Doe 1, who was a prostitute in a known area for sex work in Seattle, to perform sexual acts on her on July 15. The complaint alleges that afterward, Joubert told the woman she was an undercover officer, showed her a badge, pointed a stun gun at her, and put handcuffs on her hands and feet.

The complaint says she later drove the victim to her residence, detained her on the path to sexual assault, and held her in a makeshift cell made of cinder blocks from which she said she was going to work on paperwork.

The complaint alleges the woman “pretended to sleep and woke up thinking she might be killed if she didn’t cooperate.”

Captain Rob Reynolds of Klamath Falls Police said at a news conference that she was able to loosen some of the restraints by jamming joints she repeatedly struck the door. “Several attempts to break the door with her hands resulted in numerous injuries,” Reynolds said. “Her counterfeit injuries were pretty severe.”

The complaint alleges that the victim kicked open her car in the garage, grabbed her gun, and drove off, leaving a trail of blood. She flagged down a passing driver who called 911.

According to the complaint, the next day, July 16, two Nevada State Patrol officers tracked down Joubert in a Walmart parking lot in Reno. When approached by officers while standing outside the car with her wife, she initially refused to exit the vehicle and instead tried to cut herself with a sharp object and attempted to destroy her phone. Joubert eventually surrendered, and no harm was done to the child.

Investigators have interviewed Joubert’s wife and neighbors, but authorities say they don’t know if they were aware of the abduction.

Joubert’s residence and garage were searched in Klamath Falls, and a note written in her purse and the victim’s hand were found, according to investigators. One of them was labeled “Operation Tech Over” and included a bullet-point list that said, “Leave the phone at home” and “Make sure they have no PPL (sic) in their lives. You don’t want any kind of investigation.”

Another handwritten note included a rough sketch for an underground structure using concrete blocks, foam insulation, and waterproof concrete, investigators said.

The FBI said that Joubert could use various methods, including drugging women’s drinks, to gain control over them. The organization stated that it has set up a website for those who believe they could be potential victims to come forward.

Allegations that the rental home where Joubert had taken the woman in Klamath Falls belonged to the city’s mayor, Carol Westfall, and her husband Kevin, who is the owner of the property, were also raised. The home backs up to a park and is off a residential street, less than a quarter-mile from a highway.

According to court records, Joubert was released after her arrest in court.

“We are shocked and disappointed at what has happened,” Westfalls, who have declined to comment on their relationship with Joubert, said in an email.