The FBI has laid out a detailed case showing why agents believe a Florida man is behind his ex-wife’s disappearance from their apartment in Spain.

FORT LAUDERDALE, Fla. — The FBI has laid out a detailed case showing why agents believe a Florida man is behind his ex-wife’s disappearance from their apartment in Spain, but gave no indication about what they believe happened to her.

Court documents released Monday night show that officers believe David Knezevich resembles the man in a motorcycle helmet who spray-painted the security camera lens outside Ana Knezevich’s Madrid apartment on February 2. The man left an hour later with a suitcase.

Spanish police say they have security video of a 36-year-old Fort Lauderdale business owner purchasing the same brand of paint and duct tape hours earlier. Investigators also interviewed a woman who says Knezevich asked her to translate a text message that was sent to friends of his wife after she disappeared.

Knezevich’s attorney, Ken Padowitz, did not return a call or email Tuesday seeking comment. He has said his client is innocent and that he was in his native Serbia the day his 40-year-old wife disappeared, 2,500 kilometers (1,600 miles) away. But agents say Knezevich rented a Peugeot in Belgrade, the Serbian capital, four days earlier.

A few days later, a Spanish driver reported that his license plates had been stolen. The night Ana Knezevich disappeared, a license plate reader on her street in Madrid recorded the stolen license plate number, Spanish police discovered.

Furthermore, hours after his disappearance, a Peugeot with stolen license plates passed through a toll plaza on the outskirts of Madrid, according to surveillance video. The driver could not be seen behind the tinted windows.

The rental agency told investigators that when Knezevich returned the car five weeks later, the license plates had been replaced and the windows tinted. He had traveled almost 7,700 kilometers (4,800 miles).

Ana’s brother, Juan Henao, called the couple’s divorce “nasty” in an interview with a Fort Lauderdale detective, a report shows. He told police that David was angry because they were going to split a substantial amount of money. Ana is a naturalized American from Colombia.

The most detailed section of the FBI’s 11-page complaint against Knezevich involves an unnamed Colombian woman he met on a dating app last fall, around the time his wife moved to Europe.

The morning after his wife disappeared, the FBI says Knezevich sent him a text message asking him for a favor: Would he translate some English phrases into “perfect Colombian” Spanish for a friend who was writing a screenplay?

According to the FBI, he then sent the woman this passage in English: “I met someone wonderful. He has a summer house about 2 hours (two hours) from Madrid. We are going there now and I will spend a few days there. Although there is hardly any sign, I’ll call you when I get back.

The woman did her translation and returned it.

That morning, that translated message was texted to two of Ana’s friends from her phone.

They said it didn’t look like her. They contacted the Spanish police and began the investigation.

One of those friends, Sanna Rameau, told The Associated Press on Tuesday that after reading the FBI report, she no longer believes Ana will be found alive.

“I’m shocked,” he said. “When it’s presented in black and white, it’s different than when you just have suspicions and speculation.”