Deputy U.S. marshals have arrested a convicted sex offender, a former local bank executive, for allegedly violating conditions of his supervised release.

David G. Zerfoss was arrested at his home Tuesday on a warrant charging him with revocation of his release, a U.S. Marshals Service news release said Wednesday.

Zerfoss allegedly possessed child pornography, a violation of the conditions of his supervised release, according to the marshals.

Zerfoss is a former chief investment officer at Bank of Hawaii and Central Pacific Bank.

In January 2005 he was sentenced to 18 months in federal prison and three years of supervised release for possessing child pornography.

A week before he was sentenced by Chief U.S. District Judge David Ezra, the U.S. Supreme Court had ruled that mandatory federal sentencing guidelines were unconstitutional. Zerfoss would have faced at least 27 months in prison if the mandatory federal sentencing guidelines were still in place.

Instead, the Supreme Court ruled that the guidelines should be advisory, not mandatory.

Zerfoss pleaded guilty in April 2004 to one count of possessing child pornography downloaded from the Internet.

In a computer hard drive seized from his Makiki home in December 2003, investigators found 13 movies and 19 photos of children engaging in sexually explicit conduct. They also found evidence on the computer history log that child pornography sites had been accessed just the morning and night before, said Assistant U.S. Attorney Larry Tong.

At the time of his sentencing, Ezra said he believed it unlikely that Zerfoss would revert to his previous behavior because of rehabilitation he underwent since entering his plea.