A&E True Crime checks in on what Casey Anthony has been up to in the 10 years, her relationship with her parents and friends, her legal status and other lingering questions about her controversial murder trial.

In recent years, hair, blood, saliva, and other bodily fluids from dogs, cats and birds have helped solve several violent crimes in the U.S. and Canada. A&E True Crime profiles four instances where animal evidence helped convict a criminal.

Over the last century, dozens of highly publicized child kidnappings have shocked the nation and ignited a public effort to prevent them. Now, missing-child awareness campaigns help spread the word more widely and quickly, resulting in finding many more of these kids.

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