Even with the outstanding breakthroughs in forensic science and investigative techniques, there still remains countless gruesome murders that have remained unsolved for decades, and sometimes even centuries.

On Tuesday, it was revealed that never before seen journals kept by Lizzie Borden’s lawyer could shed new light on the bloody hatchet murder of her father and step-mother 120 years ago, and now RadarOnline.com is taking a look back at the most infamous cold case murders from history that still puzzle crime sleuths and investigators around the world.

The Beverly Hills Police Department revealed that the weapon Harold Martin Smith used to take his own life is a preliminary ballistic match to the weapon used to murder Ronni Chasen, a discovery that would not have been possible without an America’s Most Wanted tipster pointing them in the right direction.

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“I did this for one reason and one reason only,” the anonymous tipster wrote in an email to AMW and discovered by RadarOnline.com.

“And that was to get justice for Ronni Chasen, who could never get it for herself.”

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