HOUSTON --There's a break in the case where a 16-year-old girl was shot and killed. Police say her teenage boyfriend is set to face charges in the case. New details are being revealed, and officers are close to making an arrest. It's a different story than investigators had just after the shooting. Ironesha Williams says she lost her companion. "I not only call her my best friend, I call her my sister because we've been together so long," Williams said. Yonnie Griffin was shot and killed around 1am Saturday. She was found near the front door of a home on Alvin and Chain and transported to Memorial Hermann Hospital where she later died. "She a good person," Williams said. But witnesses told police a very different story when they first responded to the scene. They initially told investigators she was struck by a bullet from a drive-by shooting. "Things are going to happen no matter how much you try to protect them," neighbor Claude Harper said. "You just try to make them aware of their surroundings." But new developments were made after witness stories just weren't matching up and evidence began pointing to the boyfriend of the girl. Investigators say that 16-year-old boyfriend confessed he accidentally shot her while playing with a gun. Police say as the boyfriend attempted to disengage the hammer to a non-firing position, it slipped and discharged the weapon. "She didn't deserve to die. She was only 16. She didn't even get a chance to see her life yet," said Terrence Pierre, Griffin's uncle. Even though loved ones have more answers, it doesn't take away the pain of their loss. "I love her. She was real," Williams said. Police say the boyfriend attempted to tend to Griffin until police and paramedics arrived. Investigators plan to charge the teen with negligent homicide and say he will be taken into custody on Monday. The case will be referred to the Juvenile Probation Department.