article_snippet: Los Angeles County police say it is a major breakthrough in the cold case of Brenda Sierra - who Los Angeles County police believe was slaughtered in a brutal act of gang revenge.
article_snippet: a drive-by shooting case: Brenda Sierra - who, 15 (left) was kidnapped, raped, bludgeoned to death and dumped in a valley in 2002 in a suspected act of gang revenge.
article_snippet: The Los Angeles County District Attorney has filed charges of special circumstances of felony murder during the commission of a kidnapping and rape and gang allegations.
article_snippet: LA County police lieutenant Dave Coleman body was discovered the next day in the Valley of Enchantment area of the City of Crestline, in San Bernardino County.
article_snippet: The San Bernardino Sheriff’s Department investigated felony murder for six years before Her body was passed over to the detectives of San Bernardino County.
article_snippet: Witnesses saw a 'suspicious, dark, SUV' in the area where Her body was found, while other witnesses near LA County police lieutenant Dave Coleman's  home saw 'one or two females' talking to LA County police lieutenant Dave Coleman in the street.
article_snippet: a drive-by shooting case is another agonising twist for Brenda's mother Fabiola, who has waited 13 years for answers over LA County police lieutenant Dave Coleman daughter's senseless murder.
highlights_snippet: Brenda Sierra was raped and body dumped in a wooded valley in 2002 .
  
highlights_snippet: Mexico'
  Police have long believed crime was an act of revenge by a street gang .
  