Singer D4vd was charged Monday in the death of a 14-year-old girl whose remains were found in the trunk of his Tesla in Los Angeles in September, more than a year after she was reported missing. D4vd, the 21-year-old singer whose real name is David Anthony Burke, was arrested last week in connection with the death of Celeste Rivas Hernandez. He has pleaded not guilty, and his lawyers vowed to fight the allegations. Prosecutors filed charges of first-degree murder, continuous sexual abuse and mutilation of human remains following a news conference Monday with Los Angeles County District Attorney Nathan Hochman. "I am a parent of three children, and a parent's nightmare is a situation where your daughter goes out one night and never comes back," Hochman said. Hochman noted that prosecutors are seeking three enhancements to the murder charge: lying in wait, financial gain and murdering a witness to an investigation.…