Suspect Is Arrested in Triple Killing Near Columbia University Detectives on Saturday arrested a 30-year-old man suspected of fatally shooting three men as all four were sitting in a BMW parked across the street from a Columbia University building this month. The police said the man, whom they did not immediately identify, was arrested early in the morning in the basement of a Bronx building. Detectives recovered the gun that had been used in the killings, the police said, adding that a shirt found at the site of the shooting had DNA tying the man to the crime. "Detectives assigned to this case did a masterful job," Police Commissioner Raymond W. Kelly said in a statement. Relentlessly working it to apprehend a suspect who initially appeared so calm, collected and out of reach. On Saturday, a relative of one of the men who was killed said the magnitude of his loss kept him from taking much comfort from the news of the arrest. "There's nothing that could satisfy me," said Luis Suazo, whose brother, Heriberto Suazo, 26, was found dead in the front passenger seat of the car. They took my brother away. The other victims were Luis Catalan, 25, and Amaury Rodriguez, 30. Mr. Suazo and Mr. Rodriguez lived in Upper Manhattan, and Mr. Catalan on East 97th Street. Coming during a time of historically low murder rates, the triple homicide elicited some memories in Morningside Heights of an earlier, more violent era, when the flourishing crack trade brought a feeling of menace to many streets. Adding to the shock was that the killings, on 122nd Street between Claremont Avenue and Broadway, took place in a placid pocket of the neighborhood sometimes called Seminary Row, near the Manhattan School of Music and Riverside Church, as well as Knox Hall, which houses Columbia's Middle Eastern, South Asian and African studies programs. Investigators said they believed that the four men had been sitting in a dark gray 2009 BMW 750LI with tinted windows in the early evening of June 7, when one of the men in the back seat shot the others. All the gunshots were to the head or neck. All three victims had criminal records, the police said, and detectives suspected that the killings could have involved a dispute over drugs. Nobody in the neighborhood reported hearing gunshots, but around 6:30 p.m., a passer-by peered into the car and saw two of the men, wearing white T-shirts soaked with blood, sprawled in the front seats. When detectives opened the doors to the vehicle, they found the inside splattered with blood A surveillance camera recorded images of the man suspected of being the gunman, wearing gray pants and carrying a bag in his right hand as he left the site. As he walked away, he put on a white T-shirt, the police said, and threw another shirt he had been wearing into a trash can before turning onto Broadway. Aaron Edwards contributed reporting.