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.

Przemyslaw Jeziorski, a marketing professor at UC Berkeley, was killed on a street near where his children live, his family said.