Husband is arrested at Miami Airport for disappearance of wife Ana María Henao who vanished in Spain

A husband has been arrested at Miami International Airport for the disappearance of his estranged wife, who went missing in Spain earlier this year.

David Knezevich was taken into custody on Saturday as he returned from his home country of Serbia, where he had been for months.

The FBI and officials from the Spanish National Police conducted the arrest, as reported by EFE.

The Belgrade Interior Attaché Office and Colombian Police also reportedly involved in the arrest.

Ana María Henao, a 40-year-old Florida resident originally from Colombia, was declared missing on February 5 after she failed to meet a friend to travel from Madrid to Barcelona for a conference.

A March 12 report from Spanish publication El Cierre Digital cited 'sources close to the case' who claimed the Scientific Police found biological remains in the missing woman's living accommodations. 

But her brother, Felipe Henao, recently appeared on NewsNation's 'Cuomo' with a desperate plea to the public and denied the report about the remains, saying the family is still desperate for answers.

'We want to know the truth. We want to know where my sister is,' Henao said. 'If anybody has any information, any tips please reach out to the FBI or the Spanish authorities.'

When asked about the supposed discovery of biological remains in her apartment, Henao said he asked the FBI if the report was true and 'they told me it isn't.'

There was no further details on the specifics of the remains found.

Investigators 'don’t want to share any information, because it could jeopardize the case. I understand. Justice moves slow,' Henao added.

He said her case was being treated as matter of domestic violence as it moved through the court system, and a case of forced disappearance rather than voluntary.

Investigators recovered surveillance footage of a man in a motorcycle helmet hanging around the Florida woman's building on February 2, the day before friends lost contact with her.

He was spotted waiting for people to exit the building before slipping inside at around 9:30pm. 

The same man is believed to have spray-painted the lens of two security cameras of the apartment building in Madrid’s upscale Salamanca neighborhood. 

Knezevich's friend, Sanna Rameau, told DailyMail.com she last exchanged messages with her on February 2.

The last message from Knezevich's WhatsApp account, sent the following day, said she had 'met someone wonderful.'

'He has a summer house about 2h from Madrid. We are going there now and I will spend a few days there. Signal is Spotty. I'll call you when I get back,' it read.

Another message detailed the circumstances of their first encounter, claiming they met on the street. 'Amazing connection. Like I never had before,' it read.

Her family became concerned after they started receiving text messages in Spanish from Ana's phone that did not sound like they were written by the Colombia native. 

'That message in Spanish, it is like it’s translated from Google . It's not her. She doesn't say those things. Like nobody in Spanish will say it like that,' her brother said.

Knezevich and her husband, also known as Dusan, had yet to formally file for divorce at the time of her disappearance.