The mystery surrounds the disappearance of Kassandra Briana Ramirez, who disappeared after “visiting her ex-boyfriend.”

An aspiring chef disappeared after telling her cousin she was dating an ex-boyfriend.

Mystery surrounds the case of missing mother Kassandra Briana Ramirez, 25, more than four years after her disappearance.

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Kassandra was living in the Bronx with her cousin in 2018 and has not been heard from since she left on September 19.

Her mother, Ingrid Santana, told Dateline that she was visiting her daughter from Wyoming and Kassandra disappeared during the trip.

“I saw Kassandra on Monday September 17th,” Ingrid said, noting that Kassandra and her younger sister Rhianna spent the day together.

“They got their nails done and their hair done. And Kassandra took Rhianna to a restaurant where she taught her how to use chopsticks.”

When the sisters returned home, Kassandra told her mother that she would start a new job on Friday.

“I told her I would see what I could do about the move [to New York], so she didn’t have to stay at someone else’s house. I wanted her to be with me,” Ingrid said.

That evening, Kassandra promised to see her mother again on Saturday, Ingrid’s birthday.

However, she never showed up, and a cousin later told Ingrid that Kassandra left to meet up with an ex-boyfriend, according to NBC News.

A missing persons report from the FBI notes that Kassandra was last seen leaving her apartment on September 19, 2018.

She wore blue jeans, a leather jacket and black sneakers.

It said there were “unconfirmed reports that Ramirez was seen in a Brooklyn subway station later that night.”

“She told her cousin that [the ex-boyfriend] was downstairs and if it was too late, she would come home early in the morning,” said Ingrid.

“Security camera shows her coming down the stairs, helping an elderly lady with her groceries, turning left and placing her at Melrose Avenue and East 161 Street.”

The next morning, Ingrid reported her daughter missing.

Four years later, the investigation is still ongoing.

In a recent episode of Missing, an ABC7 EyeWitness News program, reporter Kristen Thorne set out to investigate the haunting case.

DIFFICULT PAST

Ingrid told Thorne that Kassandra had her first child at age 17, a little boy named Jaden.

He was born prematurely and died at the age of 12 days.

“When Jaden died, she went into a spiral,” Ingrid said, noting that she turned to “substances” to help her cope.

In 2012, their other son was born, but his paternal grandmother was awarded custody, according to Ingrid.

Ingrid told Thorne that Kassandra was stabbed in 2017 and claimed it was because of an argument with her son’s father and his then-girlfriend.

“She was very, very upset. A fight ensued,” Ingrid claimed.

Kassandra claimed the friend stabbed her, but police charged Kassandra, Thorne reported.

Ingrid said the charges were later dropped.

A year later, Kassandra was allegedly raped by a family friend, according to her family.

She pressed charges against the man and testified before a grand jury a week before her disappearance, her family claimed.

“It took a lot out of her. She had to relive everything,” said her aunt Suki Bueno.

“She had to do that in front of strangers.”

NIGHT OF THE DISAPPEARANCE

Bueno said Kassandra called her on September 19 to say she stopped for gas and was driving to Long Island with the ex-boyfriend, someone other than the alleged stabber.

They had an on-and-off relationship for years, relatives told Thorne.

“It was a very unhealthy relationship,” Kassandra’s friend Vivian told Thorne.

“The first day I met him, I knew something was wrong with him.”

Ingrid also had her doubts about the man, she said.

“The very first thing he said to me was, ‘Don’t you know, your daughter, I love her so much but she just pisses me off
Time.'”

Bueno said she received more calls that evening from Kassandra, who was checking in.

“The last call was as I was driving home from work,” Bueno said.

“She said, ‘Yeah, I’m going to get ready. You know, he’s going to take me right back.’

“And she started her new job. I don’t remember if it was that day or the next day, but she started a new job. So she was really excited about that.”

The family said she works as a cook and is trying to improve her life.

INVESTIGATION DEPLOYED

Police did not share surveillance footage of Kassandra leaving her home with Ingrid or Thorne when they requested it.

Thorne received call logs of Ingrid from Kassandra’s phone.

She called the ex-boyfriend’s number, which he no longer uses.

The new owner of a cell phone number reportedly claimed that he was getting a lot of random “patchy” texts.

Another number that called Thorne hung up twice when Kassandra’s name was mentioned.

Multiple sources told Thorne that when Kassandra disappeared, so did the man.

“It was pretty mixed signals at first,” Bueno said.

“Now they say he has no involvement but why are you missing for weeks?

“He told the police that he had met her but dropped her off at the train station. But then he told the friends, ‘She sent me away, she never showed up.'”

When Thorne reached an address believed to be his, a woman opened the door and told her not to come back.

However, Thorne found Kassandra’s cell phone bill and it was connected to a PO Box in Kansas.

The owner of this box lives in the Bronx and was in prison at the time of Kassandra’s disappearance.

Police said it was not known if the alleged sexual assault on Kassandra had anything to do with her disappearance. No suspects have ever been named in the case.

Anyone with information is asked to call the NYPD Missing Persons Squad at 212-694-7781.