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Prolific Italian filmmaker Duccio Tessari (La Morte Risale a Ieri Sera) returned to the giallo field with this first-rate detective thriller which begins with a French co-ed (Carole Andre) repeatedly stabbed in a park during a thunderstorm. The suspicion falls on sportscaster Alessandro Marchi (Giancarlo Sbargia), who is being framed (or so it seems) by his trysting wife (Ida Galli, aka Evelyn Stewart) and lawyer (Gunther M. Stoll). Unfortunately, while Marchi is being railroaded into prison, the murders begin anew, and Marchi is released to face the dead girl's grieving lover (Helmut Berger), whose motives would later be echoed in even better Italian thrillers such as Tenebre.
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The Bloodstained Butterfly (1971)
99 min
When a young female student is savagely killed in a park during a thunderstorm, the culprit seems obvious: TV sports personality Alessandro Marchi, seen fleeing the scene of the crime by numerous eyewitnesses. The evidence against him is damning... but is it all too convenient? And when the killer strikes again while Marchi is in custody, it quickly becomes apparent that there's more to the case than meets the eye...

The Bloodstained Butterfly (1971)
99 min
When a young female student is savagely killed in a park during a thunderstorm, the culprit seems obvious: TV sports personality Alessandro Marchi, seen fleeing the scene of the crime by numerous eyewitnesses. The evidence against him is damning... but is it all too convenient? And when the killer strikes again while Marchi is in custody, it quickly becomes apparent that there's more to the case than meets the eye...