The homeless Massachusetts woman charged in the stabbing of another woman in the bathroom of Macy's in New York City has a history of mental illness, was released from a psychiatric hospital hours before the attack and claimed voices in her head said she "had to kill someone" or be killed.

Kerri Aherne, 43, stabbed a California woman in the back on Thursday as she was changing her baby inside a bathroom in the iconic Macy's Herald Square. 

The victim, who has only been identified by her employment with the Los Angeles County Sheriff's Department, was rushed to Bellevue Hospital and was discharged on Friday.

Aherne was charged with attempted murder, two counts of assault, criminal possession of a weapon and endangering the welfare of a child in connection with what police have described as an unprovoked attack. She is being held without bail.

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Court records show Aherne, whose last known address was in Tewksbury, Massachusetts, has a long history of struggling with mental illness.

Prosecutors said in a criminal complaint that Aherne told police she had been discharged from Manhattan Psychiatric Center the morning of Thursday's stabbing after a yearlong stay.

She also allegedly said she purchased a knife at Macy's and looked for someone to kill because "voices in her head told her she had to kill someone, or she would be killed."

In 2019, records show she was deemed an incapacitated person, and her mother and sister were appointed as her guardians, according to the New York Post.

Aherne was placed on a court-ordered treatment plan to ensure she continues taking Prolixin, an antipsychotic medication used to treat schizophrenia, the records show.

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Her Facebook has been inactive since 2018. In one of her last posts, she wrote, "Going a little insane," along with a still from a Michael Jackson video.

Aherne was arraigned on Friday, when her attorney told the court he plans to request bail at a future hearing.

When the judge said she would be held without bail until her next court appearance, Aherne interrupted and begged not to be sent to another mental health facility, the New York Post reported.

"I don’t want to go to another hospital," Aherne said. "They didn’t help me at Manhattan Psychiatric Center."

She is due back in court on Dec. 17.

A Georgia woman is recovering from devastating injuries after she was doused with a corrosive chemical during an evening walk in Savannah, authorities and family members say.

Ashley Wasielewski, 46, was attacked around 8:15 p.m. Wednesday, while walking laps near Forsyth Park. An unknown assailant approached her and suddenly dumped the substance over her, according to Savannah Mayor Van Johnson.

"This kind of violence has no place in Savannah," Johnson said in a statement. "Our Police Department is treating this case with the highest urgency."

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Wasielewski is currently being treated for second- and third-degree burns covering roughly half her body. They cover her scalp, face, hands and legs, her son, Westley Wasielewski, told The Associated Press.

"We don’t know who did it," Westley Wasielewski said. "She doesn’t have any enemies. She is a friend to everyone."

Ashley Wasielewski was walking laps at the park after attending a church Christmas program when she said she noticed a shadow approaching from behind. 

As she turned around, the person dumped liquid over her head, according to her friend Connor Milam, AP reported.

"She was instantly like, 'Why are you pouring water on me?' And then her skin started to burn," Milam said. "She looked down, and her pants were starting to burn off her body. She started screaming."

Police believe the attacker was a stranger and are urgently searching for a suspect, the AP reported.

Authorities have released a security camera image of a person of interest wearing a dark hoodie.

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Detectives are working with the FBI to identify the chemical used in the attack, according to the AP.

"Detectives are actively investigating the motive and circumstances, and while this attack is deeply troubling, there is currently no information indicating a broader or ongoing threat to the public," Johnson said.