Celeste Rivas , the 15-year-old girl found dead in the trunk of singer D4vd 's Tesla, ran away "multiple times" because of trouble at home ... law enforcement sources tell TMZ.

LAPD's Robbery Homicide Division has been tracking Celeste's history, and they are trying to piece together the story of her life, according to our sources.

We're told the Lake Elsinore family contacted Riverside County law enforcement at least twice to report Celeste missing.

Our sources say homicide detectives believe there's lots of evidence Celeste comes from a "troubled home," and that may have triggered her desire to run away.

TMZ has spoken to a liquor store owner near where Celeste's school bus picked her up, and he says there was one instance -- March 19, 2024 -- where Celeste's sister came to

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