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 University of California, Berkeley professor Przemyslaw Jeziorski's killing, including his ex-wife and her current partner. Jeziorski was shot multiple times at close range on July 4 while visiting Athens to see his children and attend a family custody hearing.

Przemyslaw Jeziorski, who taught quantitative marketing as a tenured associate professor at Berkeley's Haas School of Business, was killed on July 4 in Athens by an attacker who shot him in the chest