Greek police have arrested at least five people in connection with the killing of a UC Berkeley professor, including the professor’s ex-wife, according to CNN and local news reports.

The ex-wife of a University of California, Berkeley professor who was fatally shot during a visit to Greece earlier this month is among five people who have been charged in his killing, reports say.

Greek police have charged five people in the case of murdered UC Berkeley professor Przemyslaw Jeziorski, 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.