The estranged husband of a missing Florida woman has been arrested on a federal kidnapping charge after authorities said someone matching his appearance was seen blacking out the security camera at her apartment building in Spain on the day she disappeared.

David Knezevich, 36, was arrested at Miami International Airport Monday when he arrived on a flight from Serbia, authorities said. His wife, Ana Maria Knezevich Henao, 40, vanished in Madrid, where her brother told police she had gone to clear her head amid the couples acrimonious divorce.

Ana and David are going through a nasty divorce and there is a substantial amount of money on the line to be split up between the two, her brother, Juan Felipe Henao, told police, according to an incident report obtained by the Sun Sentinel .

The former couple shared a real estate business in Ft. Lauderdale and worked together at an IT company called EOX Solutions , where David Knezevich served as CEO, the Sun Sentinel reported.

The FBI laid out an eyebrow-raising case against Knezevich in a detailed criminal complaint obtained by HuffPost.