When Shirley Finn was found dead inside her car at the Royal Perth Golf Club, plenty of witnesses came forward with information about who she was with that night. But considering all the dirt she had on Perth police officers and local politicians, investigators weren't interested in bringing her murderer to justice. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Thanks to high-level connections and generous kickbacks, Shirley Finn ran one of the most successful brothels in Perth. But moving around loads of cash for the criminal underworld would come at a higher price than she could imagine. Learn more about your ad choices. Visit podcastchoices.com/adchoices

In October 1860, James Mullins was executed for the murder of Mary Emsley. But the case against him was built upon circumstantial evidence. Two crime novelists from different eras tried to solve what may have been the perfect crime. Learn more about your ad choices. Visit podcastchoices.com/adchoices

In 19th-century London, Mary Emsley outlived most of her family, two husbands, even her own child, before being brutally bludgeoned to death in her East End home. With multiple suspects, the case becomes a whodunit that eludes investigators even after they make an arrest.  Learn more about your ad choices. Visit podcastchoices.com/adchoices

Even after a ransom note was discovered, FBI agents were skeptical when William Parsons and 36-year-old housekeeper Anna Kupryanova insisted Alice Parsons was kidnapped. Then a discovery in the home's septic tank pointed to a possible motive. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Alice Parsons was the heiress to her uncle’s fortune and the owner of a large property in Stony Brook, New York. When she vanished, authorities assumed it was a simple missing persons case. But with a love triangle, illegitimate children, and Russian ex-lovers, there was nothing simple about it. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Authorities determined there was only one suspect who had any motive to murder the Grubers. One person with a grudge against the family and who had a history of violent confrontations with them as well. So why weren't authorities able to get a conviction? Learn more about your ad choices. Visit podcastchoices.com/adchoices

The Gruber family had their share of problems, and the townspeople near their rural German settlement knew it. But nobody could fathom who would want to slaughter five members of the family and the family maid in cold blood. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Three months after 22-year-old Clara Olson vanished, her body was discovered in a shallow grave. With her were two letters from Erdman Olson. Authorities had a suspect in her murder, but suddenly, Erdman was nowhere to be found. Learn more about your ad choices. Visit podcastchoices.com/adchoices

In May of 1926, 21-year-old Clara Olson realized she was pregnant with her boyfriend Erdman Olson’s child. He felt he was too young to get married and didn't want to tarnish his reputation. So he hatched a plan to make sure nobody in his Wisconsin community would ever find out about his unborn child. Learn more about your ad choices. Visit podcastchoices.com/adchoices