The brother of “Dark Knight " director Christopher Nolan, Matthew Francis Nolan, has been arrested in connection with an alleged 2005 murder in Central America, according to a report in the Chicago Sun-Times.

Nolan, 40, had been under investigation by Chicago Police in an alleged $700,000 bank-fraud scheme, when FBI agents arrested him last month in connection with the alleged 2005 killing of Florida businessman Robert C. Cohen in Costa Rica.

According to the report, Nolan pretended to be a fellow businessman while in Costa Rica, where he met Cohen, but was actually there to allegedly get back $7 million from Cohen, which was owed to another Florida man, authorities claimed.

An alleged accomplice of Nolan’s, Douglas Mejia, reportedly kidnapped Cohen and attempted to extort money from Cohen’s family, Costa Rican authorities told the paper. When the extortion failed, Nolan and Mejia allegedly killed Cohen, according to the Sun-Times.

Mejia has already been convicted, while Nolan is currently being held in Chicago, awaiting extradition proceedings.

According to the paper’s source, Nolan was under investigation for an alleged unrelated $700,000 check-kiting scheme.