MS-13 is not only terrorizing Long Island's village of Patchogue, but has Latinos who live and work there fearful that the gang's presence will contribute to widespread anti-Latino hostility.

A&E True Crime looks at some high-profile cases where crime-scene glitches may or may not have tipped the scales of justice.

Sgt James Hager of the Monroe County Sheriff's Office talks about the challenges of processing a crime scene under water and how procedures for handling violent crimes at sea differ from handling them on land.

Forensics has revolutionized law enforcement in the last several decades. We talk to the experts to see how these advancements have helped to close tough cases.

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.

Retired Detective Sergeant Joseph Giacalone had the pleasure of working with compassionate cops who truly loved the job and "cowboys" who were unworthy of the badge. Here are some of his stories.

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

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.