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A second suspect in the stray-bullet killing of a seven-month-old baby on a Brooklyn street was arrested on Friday, investigators said, two days after a shooting the New York<\/a> police department (NYPD) commissioner called \u201ca tragedy that truly shocks the conscience\u201d.<\/p>\n Matthew Rodriguez, 18, was apprehended in Pennsylvania by NYPD detectives working with US marshals, according to authorities.<\/p>\n The suspected shooter, 21-year-old Amuri Greene, was arrested shortly after the drive-by gunfire that killed Kaori Patterson-Moore. Greene pleaded not guilty to murder and other charges at an arraignment on Friday night.<\/p>\n Kaori was in her stroller when two men sped down a street on a moped on Wednesday afternoon. Greene, riding on the back of the vehicle, fired into a group of people on a street corner, according to a court complaint.<\/p>\n Kaori\u2019s mother, Lianna Charles-Moore, told the New York Post<\/a> that after hearing what she initially believed were fireworks, she was comforting her startled two-year-old son \u2013 who had been grazed by a bullet \u2013 when she looked to her left and saw her baby daughter bleeding. The infant had been shot in the head.<\/p>\n \u201cMy daughter was innocent. She didn\u2019t deserve that,\u201d Charles-Moore told the newspaper. She said her daughter was just about starting to crawl and had recently begun saying \u201cMama\u201d.<\/p>\n