The body was found Monday afternoon at the Waste Management Landfill and has since been identified as 23-year-old Karina Banta from Hayward, Alameda County Sheriff's Office said Thursday.
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Investigators were able to identify Banta by her finger prints.
Banta's cause of death is undetermined as officials wait for the results of a toxicology report.
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Officials reported Banta had problems with substance abuse and mental health.
They say there were no signs of a struggle, but that the body's decomposition may have camouflaged any apparent signs of trauma or injury.