In broad daylight, in this typically quiet, suburban neighborhood of Greece’s capital, he was shot multiple times at close range, according to police. Jeziorski died where he fell, police said, his body riddled with gunshot wounds seen in grim photographs taken in the immediate aftermath.

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

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