Norris was found strangled at the end of a dead end road in Placer County in 1983 after she went grocery shopping in Sacramento .
Following Knorr 's arrest , police decided to reopen the murder case of her sister , Rosemary Norris .
Norris was found strangled at the end of a dead end road in Placer County in 1983 after Knorr went grocery shopping in Sacramento .
Following Knorr 's arrest , police decided to reopen the murder case of her sister , Rosemary Norris .