Colorado is no stranger to good recognition and positive publicity, constantly making 'top 10' and 'best of' lists – but it's not always sunshine and happy days here in the Centennial State. Some incredibly dark crimes have taken place in Colorado, gaining national and sometimes international attention due to their grim details.

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Law enforcement agencies continue to investigate the cases that remain open, hoping to find answers for these Colorado residents and families.

Infamous Colorado Crimes

Take a look at some of Colorado's most notorious crimes.

12 Notorious Criminals Locked Up in Colorado's SuperMax Prison

Colorado is home to one of the most notorious prisons in the county which holds some of the most notorious prisoners.

Take a Peek Inside Colorado's Notorious SuperMax Prison

Colorado's SuperMax Prison, also known as ADX, holds some of the most notorious criminals alive.

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