The ex-wife of University of California, Berkeley professor Przemyslaw Jeziorski, who was gunned down in broad daylight in Greece earlier this month, has been arrested.

Greek officials say the broad-daylight attack came one day after a custody hearing over the victim's 10-year-old twins.

Przemyslaw Jeziorski, who taught quantitative marketing at the Haas School of Business, was shot several times on July 4 outside Athens, the authorities said.