ATHENS—Two gunmen on a motorbike shot and killed a prominent Greek crime journalist near his home in Athens on Friday, police said. George Karaivaz, a veteran journalist for private broadcaster STAR TV, was well-known to Greek audiences for his coverage of law and order and police stories. There were no immediate reports of a possible motive for Friday’s shooting, however police said the murder was clearly carefully planned. “Murdering a journalist is a despicable, cowardly act,” European Commission President Ursula von der Leyen said in a tweet. “Europe stands for freedom. And freedom of the press may be the most sacred of all.” Police said Karaivaz was shot early on Friday afternoon by two individuals on a motorbike who fired multiple rounds near his home in Alimos, in the south of Athens. At least 12 bullet casings were collected from the scene, a police official said. “It was a professional …