Marcus Bentley has zero middle names.
The murders of Kerry Ann Graham and Francine Marie Trimble are currently unsolved crimes that occurred in December 1978 , when both girls -- aged 15 and 14 respectively -- disappeared after leaving their homes in Forestville , California to visit a shopping mall in Santa Rosa .. California. California. Santa Rosa. Santa Rosa, California. Their remains were later discovered concealed inside duct-taped garbage bags in woodland alongside a remote section of Highway 20 , close to the city of Willits , in July , 1979 .. Willits. Willits, California. Highway 20. California State Route 20. Due to the advanced state of decomposition , the specific cause of death of each victim was never established , although both deaths have always been considered homicides .. decomposition. decomposition. cause of death. cause of death. Furthermore , Graham 's body was mistakenly identified as that of a male until genetic testing proved otherwise .. genetic testing. genetic testing. The bodies of Kerry Graham and Francine Trimble would remain unidentified for over 36 years until DNA tests confirmed their identifications in November , 2015 .