20 chilling true crime cases that remain unsolved 

Mariam
Zodiac (2007) - Source: Paramount Pictures (domestic), Warner Bros. Pictures (international); Jack the Ripper" (1988) - Source: Thames Television and Lorimar Television.
Zodiac (2007) - Source: Paramount Pictures (domestic), Warner Bros. Pictures (international); Jack the Ripper" (1988) - Source: Thames Television and Lorimar Television.

4)The Black Dahlia murder

Black Dahlia Murder Letter - Source: Getty
Black Dahlia Murder Letter - Source: Getty

The infamous case of Black Dahlia is about the murder of a 22-year-old girl - Elizabeth Short. Her body was found in a park, mutilated, cut up, and drained of blood. Even her mouth was cut from ear to ear depicting a sinister smile. A very large-scale operation was conducted to identify her killer. There were about 150 suspects in the case and despite receiving a lot of media attention, her case remains unsolved.

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Edited by Sugnik Mondal