“48 Hours” cases breaking down the evidence in these shocking stories. Watch the YouTube mini-marathon, which includes "The Tree that Helped Solve a Murder," "The Golden State Killer" and "What Ally Kostial Didn't Know."

00:00 The Tree that Helped Solve a Murder
41:37 The Golden State Killer
01:25:09 What Ally Kostial Didn't Know

True crime. Real justice. "48 Hours" investigates the most intriguing crime and justice cases that touch on all areas of the human experience including greed and passion. "48 Hours," which premiered in 1988, has developed a rich history of original reporting and impact journalism that has helped exonerate wrongly convicted people, caused cold cases to be reopened and solved, and along the way changed lives.

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