D4vd at the Coachella festival in April. (Timothy Norris/Getty Images for Coachella)Popular singer D4vd is cooperating with authorities after investigators found a body in the trunk of a car registered to the musician, a representative for the artist said.The Tesla was impounded last week at a tow yard in Hollywood, Calif., after employees reported a foul odor coming from the car. Police said officers found human remains inside a bag in the front trunk of the Tesla."D4vd has been informed about what's happened.