David Burke, known as D4vd, is the main suspect in the murder investigation of 15-year-old Celeste Rivas Hernandez whose remains were found in his black Tesla.Burke has canceled all US tour dates amid the investigation, and authorities suspect he may have helped dismember and dispose of Rivas's body.The LAPD continues to investigate the case, awaiting toxicology results to determine the cause of death and considering the case a homicide.