The site in Linden has been an investigation scene since two convicted killers told San Joaquin County sheriffs where victims were disposed. The so-called "Speed Freak Killers" were convicted of serial murders from the '80's and '90's. Nine-year old Michaela Garecht disappeared from a Hayward grocery store in 1988 and her family is waiting to see if DNA from recovered bone fragments at the site could solve the case.