A STILL unidentified man shot and killed an executive of a firm that sells computer toner and ink in what is believed to be a robbery in  downtown Cagayan de Oro at around 3:30 pm today. Police said the attack was carried out inside the firm called Romeo V. Austria Trading at Pabayo and Gomez streets, this city. Chief Insp. Alfredo  Ortiz, Cogon police chief, identified the victim as Roland Bonhanoy. Ortiz, Cogon police chief, said the victim was shot and killed at the third floor of the establishment where he held office. The establishment reportedly has several office compartments. An employee of the company told The Gold Star Daily Bonhanoy was attacked by a man who concealed his face with a mask and a helmet. The witness said the assailant, who wore a white shirt, was armed with a caliber .45 pistol. He said he heard two gunshots upstairs, and the suspect pointed the pistol at him before he fled.