The Los Angeles Country District Attorney’s Office announced on Monday that they were charging singer D4vd with first-degree murder in connection to the death of a teenage girl. The singer, best known for his official “ Fortnite ” anthem “Locked and Loaded,” was arrested last week following a months-long investigation into the death of 14-year-old Celeste Rivas Hernandez. Hernandez’s remains were found in the trunk of an impounded Tesla belonging to the singer last September. She had been missing since April. Related “Lover, Stalker, Killer” centers a deadly love triangle Authorities allege the 21-year-old artist, whose real name is David Burke, killed Hernandez to keep his relationship with the minor from jeopardizing a “very lucrative musical career that Celeste was threatening.” Burke is also charged with crimes related to lascivious sexual acts with a minor and mutilating a corpse.…