killed in a drive-by shooting while riding in a car with her mother and her sisters. an anonymous tip now leading to an arrest. abc's marcus moore in houston. >> reporter: tonight, eric black jr. is being held without bond, charged with murder in connection with the shooting death of 7-year-old jazmine barnes. authorities originally investigating jazmine's death as a possible hate crime, after jazmine's family told them they saw a red truck and this white male in a hoodie at the scene. but now, authorities say, that description was a case of mistaken identity. >> we believe now that that red truck and the driver is most likely just a witness. >> reporter: thanks to a tip, first shared with activist shaun king, investigators now believe black and another suspect opened fire on jazmine's family's car, mistakenly thinking it belonged to someone they had gotten into a fight with at a club the night before. >> it's incredibly tragic. i look forward to going and being able to pursue justice on her behalf, because no 7-year-old deserves this. no family deserves this.