A Rio de Janeiro policeman confessed to murdering Greece’s ambassador to Brazil in what investigators called a “cowardly act” carried out at the direction of the diplomat’s Brazilian wife, with whom the officer was romantically involved. The envoy, Kyriakos Amiridis, 59, was killed on Monday by the officer, Sergio Gomez Moreira, Rio homicide division chief Evaristo Pontes told a news conference. This was a tragic, cowardly act ... It was a crime of passion...