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.

Greek police have charged five people in the case of murdered UC Berkeley professor Przemyslaw Jeziorski, including his ex-wife and her current partner.