Journalist Hrant Dink, one of the most prominent voices of Turkey's shrinking Armenian community, was killed by a gunman Friday at the entrance to his newspaper's offices, police said. Dink, a 53-year-old Turkish citizen of Armenian descent, had gone on trial numerous times for speaking out about the mass killings of Armenians by Turks at the beginning of the 20th century. He had received threats from nationalists, who viewed him as a traitor. Dink was a public figure in Turkey, and as the editor of the bilingual Turkish-Armenian newspaper Agos, one of its most prominent Armenian voices. Prime Minister Recep Tayyip Erdogan, in a press conference after the killing, vowed to catch those responsible and called the slaying an attack on Turkey's unity.