Every detective has one "cold case" that's still waiting to be solved, but these 10 mysterious crimes have baffled the entire country for decades. See if you can crack any of them!
1. The Alphabet Murders
In the 1970s, three little girls from Rochester, New York were found murdered. As shocking as this was, their names were even more surprising: Carmen Colon was found near Churchville, Michelle Maenza was found in Macedon and Wanda Walcowicz was found in Webster.
While the cases are still unsolved, a man named Joseph Naso is strongly suspected. He was convicted of another series of "alphabet murders" in California, where one of his victims was also named Carmen Colon. Naso was a photographer who traveled between the coasts, and his diary mentioned a murder in "Buffalo woods."
But DNA evidence ruled him out as a suspect. Could the alphabet killer still be roaming Buffalo?
2. The Jamison Family Disappearance
In 2009, Bobby Jamison, his wife Sherilynn and their daughter Madyson went to look at a new home in Red Oak, Oklahoma when they vanished. Days later the family truck was found, with the family's IDs, cell phones, and even the family dog still inside - but no trace of the Jamisons.
To make things even more mysterious, $32,000 in cash was found inside the truck. While the Jamison family's bodies were discovered in 2013, no one can explain what happened to them, and why the cash was left behind.
Sherilynn's mother has a theory of her own: that the Jamisons were murdered by a mysterious cult living near Red Oak.
3. Jimmy Hoffa
Jimmy Hoffa's disappearance has become something of a running joke, even among conspiracy theorists. Hoffa was the former head of the International Brotherhood of Teamsters, America's largest union.
He was also connected to the Mafia, and served time in prison - which is why he lost his job as union president. Hoffa went missing after a pair of Mafia leaders failed to show up to a meeting with him outside of Detroit.
So far all of the places Hoffa is rumored to be buried - including Giants Stadium in New York and a Detroit suburb - have turned up nothing. The FBI is convinced Hoffa is dead and buried (somewhere), but some say he's still alive to this day.
Learn about more famous cold cases - including the Black Dahlia murder - on the next page!