I think it is more as to what didn't tip them off.
It was the Los Angeles Police Department, and the LA Country Coroners Office who investigated, and I believe both of those offices are intrinsically connected to Jew's in the entertainment industry.
Regardless, when the body was discovered, no need to interrupt that flow of steady cash while the getting was good.
He ended his tour on Nov. 4th, in Warsaw, Poland.
Don't know how long it took him to get back to the US after that, but they definitely waited until he was back, done making them money, to name him as a suspect.
Oh, by the way, the girl found murdered in his trunk was 15 year-old Celeste Rivas Hernandez.
I wonder if the detectives could've ever done that fancy detective-work, and connected that with his song,