The sensational discovery of the murder weapon, found hidden behind a kitchen unit in an apartment in the town of Olten almost 30 years after the crime, not only renewed the investigators' hope but also raised a multitude of new questions. Once the registered owner was identified, the police initiated an international manhunt, but the results were less than promising.

Taking a close look at the arrest of Robert, the murdered couple's son, and his girlfriend Anita, whom the police considered the prime suspects. But them having ironclad alibis soon Roberts estranged cousin 'Johnny' entered the scene, not least because a few weeks prior to the murder he was seen at a Basel gun store buying ammunition.

Episode 2 takes a closer look at the victims, especially at Eugen Siegrist, the owner of the cabin and most likely the main target of the assassination and we will look at the Friday, the day prior to the murder when some rather odd events occurred at Eugen's work place. We then try to establish a detailed account of the events as they could have enfolded on the fatal day in June.

On June 6, 1976 a 28 year old daughter finds her parents and aunt along with her two sons murdered at her father's remote weekend cabin in the Swiss countryside. All five victims showing at least one bullet hole in the forehead, hence were shot at point blank range. Apparently none tried to escape or intervene. Thirteen shell casings were found at the scene of the crime and the murdered couple's car, that the murderer/s used to escape, was located the same day 30 km away. The couple's son (20) became the prime suspect. Yet neither a motive nor the murder weapon could be found.

Author & Host

• Rudolph Isler

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• Playground Media Productions Ltd.

A gripping true crime podcast delving into Switzerland’s most talked-about and perplexing murder case. Five family members executed with chilling precision. Shot at point-blank range in the forehead. The crime bears a haunting resemblance to a Mafia contract killing, and its motive continues to elude the police, shrouded in mystery to this day.

The episode explains the 30 year staute of limitations for capital crimes in Switzerland and describes the pro and cons of the abolition bill currently under discussion in the Swiss parliament.

Author & Host

• Rudolph Isler

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The last episode is a summary of the events and presents the most common of possible scenarios as well as a new personal account by the author. However, it remains up to the listener to figure out what really happened on that day in July 1982 and what led to the tragic and mysterious deaths of the two teenagers, who’s murderer may still live near the Crystal Caves.

Author & Host

• Rudolph Isler

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Episode 7 is about startling new testimonials that surfaced 37 years after the double murder. Observations that once again put a familiar suspect right back into the spotlight, even though the case had reached its 30-year statute of limitation for murder in 2012. And we follow up on private investigators that still wanted to solve the mystery about the double murders.

Author & Host

• Rudolph Isler

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• Playground Media Productions Ltd.