The police announced that they had arrested a third man in connection with the shocking murder of a 4-year-old boy. But police still don't know who fired the bullet that killed Lloyd Morgan.

Lloyd had been playing in a playground in the Forest Houses in the Bronx when gunfight broke out at a neighboring basketball court. He was shot in the head and died at a hospital.

Earlier this week, Rondell Pinkerton, 17, was arrested and charged him with murder as well as criminal possession of a weapon while Courtney Kelly, 27, who was shot, was charged with criminal possession of a weapon. Yesterday, Ronald Jeffrey, 19, was arrested and charged with murder, attempted murder, and criminal possession of a weapon.

Police are still trying to determine the nature of the shooting, but believe it was a sparked from a rivalry. Police Commissioner Kelly said on Wednesday, "One location where a group of people hang out and do low-level drug dealing against another location who do virtually the same thing. This is the nature of the dispute, they diss each other."

Pinkerton is allegedly claiming self-defense, and Kelly said on Thursday, "It's this circular reasoning...some people you talk to them, I have a gun because other people have a gun. I need it for self defense. It's this catch-22 that is going around."

Lloyd's mother, Shianne Norman, spoke on Thursday, "This is horrific and this cannot keep happening. There's so many mothers standing behind me right now who have gone through this and let me tell you I wouldn't wish this on my worst enemy….These killings have to stop. They've got to stop taking babies."