Doris Grandfelt, an employee at an accounting firm, was brutally stabbed to death... but nobody knew exactly where the crime took place. Her body was found the next night, dumped among a dense thicket of trees along the edge of an urban park, eight miles east of St. Paul, Minnesota. Despite her twin sister Lara Grandfelt's persistent calls to the Bureau of Criminal Apprehension, the killer was never found. Twenty years later, Lara has been diagnosed...