Celeste Rivas's death investigation is escalating in Los Angeles, with a grand jury continuing to hear testimony after her body was discovered in singer D4vd's impounded car.D4vd's manager, Robert Morgenroth, testified he did not report finding Rivas's body because he wanted the tour to continue, prompting prosecutor Beth Silverman to seek a compelled testimony from an uncooperative witness.Police are reportedly preparing to arrest the unnamed witness, represented by attorney Evan Jenness, further intensifying the legal proceedings that began in September surrounding the 14-year-old's death.