Months before Przemyslaw Jeziorski, a marketing professor from the University of California, Berkeley, was killed, he filed a restraining order against his ex-wife.

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.