Linda Fairstein, former sex crimes prosecutor, and Cynthia Calkins, PhD, a forensic psychologist, on how we can protect our families from sex offenders.

How sound is the reasoning that a refusal to take a polygraph test is a sign of guilt? We speak to former polygrapher and current anti-polygraph activist, Douglas Williams, about what he sees as the test's fundamental problems.

We ask retired CSI detective Ken Martin about the legitimacy of TV cops digging bullets out of walls, tying red strings through a scene, and other forensic techniques to learn which are real and which are just for the camera.

We asked Live PD's Officer Alyssa Wright how it feels to be called a role model, working with her K-9 partner Cairo, and what you didn't see happen during that intense take down featured on a recent episode.

In the second part of a three-part series on crime-scene investigating, retired CSI Ken Martin breaks down what happens once law-enforcement teams arrive and some of the challenges he's faced in gathering evidence.

Linda Fairstein talks to us about her most memorable unsolved case, what concerns her about how sexual assaults are handled on college campuses and how she is often inspired by real-life events in her books.

Many people think the concept of a citizen's arrest is a joke or a myth. Can a citizen who isn't a law-enforcement official really arrest someone at their will? We asked Live PD analyst Tom Morris Jr. about this mysterious practice.

We've all heard that one big sign someone is lying is if they can't look you in the eye. How much truth is there to that? Apparently, none.

Convicted podcaster Brooke Gittings and attorney Rachel Kamins talk about where Convicted and the series The Keepers potentially intersect.

Q&A with forensic artist and sculptor Lisa Bailey on what it takes to do her job, from reconstructing a lost person from just a skull to helping traumatized crime victims remember visual details.