• Anabel Segura, a Spanish student, was 22 when she was kidnapped in Madrid in 1993.
• Her case is the focus of Netflix's new docuseries "900 Days Without Anabel."
• Here's what happened to her kidnappers, Emilio Muñoz Guadix and Candido Ortiz Aon.

"900 Days Without Anabel" is about the kidnapping of Anabel Segura, a 22-year-old Spanish student abducted from Madrid in 1993.

The three-part Netflix docuseries is the streamer's latest international true-crime offering after projects like "The Asunta Case" and "The Man with 1000 Kids."

Segura was kidnapped by Emilio Muñoz Guadix and Candido Ortiz Aon on the morning of April 12, 1993, on a run in her north Madrid neighborhood, La Moraleja.

The pair forced Segura into a white van before driving her to an old factory in Toledo, an hour away from Madrid.

In 2013, Muñoz Guadix told news outlet laSexta that they killed Segura six hours later as she tried to escape.

Muñoz Guadix and Ortiz Aon pretended Segura was alive for over two years in an attempt to extort money from her wealthy family.

The pair of kidnappers called the family 14 times between April 1993 and September 1995 to demand up to $950,000 in ransom money. The Netflix docuseries includes the recordings of these phone calls.

Muñoz Guadix and Ortiz Aon were arrested on September 28, 1995, after recordings of the calls were televised. Spanish newspaper El País reported at the time that the authorities were called by someone from the Escalona region of Toledo, who identified Ortiz Aon's voice from the recording.

Muñoz Guadix and Ortiz Aon told the authorities where they buried Segura, enabling her family to hold a funeral.

Candido Ortiz Aon died in prison in 2009 and Emilio Muñoz Guadix was released in 2013

Spanish outlet La Vanguardia reported that the pair were both convicted of kidnapping and murder. They were sentenced to 39 years in prison in 1999, which Spain's supreme court then increased to 43 years.

Ortiz Aon served the first 10 years of his sentence in the Ocaña prison in Toledo, but he died from a heart attack in 2009, at age 48.

Muñoz Guadix was incarcerated in the Herrera de La Mancha prison in the Ciudad Real province south of Toledo. The news site Heraldo reported he was released in 2013 after serving 18 years.

The outlet reported that on leaving prison Muñoz Guadix told the press that he was not a danger to the public, and he regretted his actions.

"I made a serious mistake, which I accepted from the first moment, unlike others, and that's it," he said.

Muñoz Guadix said his motive was "purely economic."

He said: "I am sorry, I am very sorry for what happened, I already said it in court, I would give ten years of my life so that this would not have happened."

It's unknown where Muñoz Guadix lives now, or what he does for a living.