Thomas G. Martin, former supervisory federal agent for the U.S. Department of Justice, gives his take on the disappearance of Madeleine McCann.

Read an excerpt from Michael Arntfield's true-crime book 'Mad City: The True Story of the Campus Murders America Forgot,' about the 1968 campus murder of University of Wisconsin-Madison student Christine Rothschild and her best friend's fight to find the killer.

Melting ice that exposed the buried bodies of missing people was one offbeat way a cold case was reopened.

Authors Blaine Pardoe and Victoria Hester on why eight murders along Colonial Parkway in Virginia have gone unsolved for so long.

Join Brooke Gittings from the hit podcast, Convicted, as she takes a deeper dive into the Cold Case Files episode, "Sweethearts, Silenced," in the newest installment of Cold Case Files: The Podcast.

A run-down of the cold case of a Baltimore nun, currently the subject of a Netflix docuseries.

Learn about the cold case murder of a teen mom from Detroit.

Learn about the cold case murder of an Arizona college student.

Learn about the 1998 cold case Murder of Yale student Suzanne Jovin.