Prosecutors allege the singer D4vd dismembered the body of a 14-year-old girl using a chainsaw purchased a week after she was killed -- including amputating a finger that had his name tattooed on it to "distance himself from the victim," according to a graphic new filing in the murder case. D4vd -- a 21-year-old Los Angeles resident whose legal name is David Burke -- was charged last week with the murder of Celeste Rivas Hernandez following a monthslong investigation. Subscribe to ABC News on