Rebecca Auborn, 33, during her arraignment in Columbus, Ohio, in 2023.Courtney Hergesheimer / Columbus Dispatch / USA Today Network

An Ohio sex worker charged with fatally drugging four customers and trying to kill a fifth in a series of crimes described by authorities as "serial killings" pleaded guilty Friday to four counts of murder.

Rebecca Auborn, 35, also pleaded guilty to one count of felonious assault and theft, a spokeswoman for the Franklin County Prosecutor`s Office said. She faces a maximum prison term of 69 years to life.

Auborn`s is scheduled to be sentenced Feb. 20. Her lawyer declined to comment.

In a statement, Ohio Attorney General Dave Yost said authorities had gathered an "overwhelming amount of convincing evidence" that "left no doubt that a conviction was forthcoming."

A relative of victim Wayne Akin said she was grateful that Auborn was being held accountable.

"I`ve spent two years preparing for the worst, and now it`s almost over," Christyn Akin-Crockett said by text. "The grieving process can finally begin."

Auborn was indicted in 2023 on multiple counts of murder, aggravated robbery and felonious assault. Authorities have said that between January 15 and June 17 of that year, she met four customers for sex in the Columbus area and fatally drugged them with fentanyl.

In December 2022, she was accused in the attempted overdose of a fifth person and charged with aggravated robbery.

Officials previously identified the victims as Akin, 64; Robert Snoke, 54; Joseph Crumpler, 30; and Guy Renda Jr., 42.

Relatives of Akin have said it`s unclear whether he was actually a customer of Auborn`s. His daughter, Christyn Akin-Crockett, has criticized authorities for what she described as an initial lack of interest in pursuing leads that she said showed Akin`s death was suspicious.

Months before Auborn`s arrest, Akin-Crockett said she heard from a tipster that a woman named "becka" had killed four people, including Akin, in April 2023. She said she tried to provide that information to the Columbus Division of Police but was turned away and told that officials were awaiting toxicology results to determine if Akin`s death was suspicious.

She said she eventually provided those details to a detective after the June 2023 death of a fourth man.

The Columbus Division of Police has previously said it was reviewing Akin-Crockett`s account. The department did not immediately respond to a request for comment Friday.