Greek police detained four suspects in northern Greece as they probe the execution-style killing of Giannis Lalas, who had been acquitted in the high-profile murder of crime journalist Giorgos Karaivaz

Police have recovered the weapons used in the killing of Giannis Lalas near the mountainous resort of Arachova. Authorities are searching for the assassin and the heightened possibility of a contract killing

Yannis Lalas, 42, previously charged and later acquitted over the killing of crime reporter Giorgos Karaivaz, was gunned down with a Kalashnikov in a central Greece hotel room. Police are investigating a possible contract killing linked to organized crime