Dressing in disguise is a time-honored Halloween tradition where self-expression and secrecy often meet. But costumes can also serve a much more sinister purpose. Learn about murderers who literally dressed to kill.

Ken Holmes, a retired death investigator and coroner, talks to A&E True Crime about the small clues that have helped solve big crimes and the surprising aspects of dealing with death for a living

Kristina Anderson, survivor of the Virginia Tech mass shooting, tells her story of that tragic day and how to prepare for an active-shooter scenario.

Fred Paige, investigator on the A&E series The Eleven, on why the murders of so many teenage girls in Texas have gone unsolved for so long and the common thread among family members of the victims.

Did you know killer Ted Kaczynski, also known as the Unabomber, had an IQ of 167 and went to Harvard when he was only 16 years old?

Celeste and Steven Sanchez recount their experience helping victims at the Las Vegas shooting.

In the wake of major hurricanes that have ravaged Texas, Florida and many parts of the Caribbean, including most recently, Puerto Rico, retired Miami-Dade Police Major Rey Valdes shares his experience policing in the aftermath of 1992's Hurricane Andrew.

Watch a video on the life of the infamous serial killer, Son of Sam.

Over 20 years later, Dr. Stuart Hart, a child psychologist and expert defense witness in the trials of Erik and Lyle Menendez for the 1989 shotgun murder of their parents, still believes the brothers were abused.

In the wake of the Las Vegas mass shooting, we asked Ken Holmes, a retired California coroner and former death investigator, how coroners prepare physically and emotionally for large disasters.