MEXICO CITY: Mexican authorities on Sunday arrested a former police officer in connection with the brutal slaying of a prominent photojournalist and four others in a case that sparked international outrage. Police arrested a man “identified as Abraham Torres Tranquilino” for alleged involvement in the killing of Ruben Espinosa, rights activist Nadia Vera and three other female victims, Mexico City prosecutor Rodolfo Rios said in a statement. Espinosa and the other victims were found dead on July 31 this year in a Mexico City apartment, their hands bound and their bodies bearing signs of torture. Torres, 24, worked as a police officer in the capital until 2011, when he was arrested and convicted of torture in a separate case. He went on to serve about a year in jail.