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When a respected detective becomes a suspect in the death of his wife, a crime scene analyst says gunshot residue may hold the answer.

Stay informed with the latest breaking news and headlines.

Inside the entertainment newsgathering process, as reporters coast-to-coast break headlines, advance the stories of the day and sit down with celebrities.

The weekday news magazine takes an in-depth look at topics from politics to personal finance, featuring watchdog reports about government corruption and failures, consumer alerts and health care issues.

A cunning serial rapist who leaves no decisive evidence forces investigators to rely on geographical profiling in their search for an identity; DNA from a cigarette butt may provide the final piece of evidence needed to catch the suspect.

Paid programming.

Paid programming.

Paid programming.

A dog named Chevy is a good candidate for a brace; a dog named Toby takes part in My Pet's Brace's first ever pressure mat study to see how much pressure dogs can put on their legs after receiving braces or prosthetics.

Experiments reveal the secrets of color; making clouds of color with rainbow powder; how ink manufacturers create color.

Looking at some of the most intelligent animals on the planet.

Helicopters took a lot of their early inspiration from the dragonfly; a look at how the dragonfly and the wings of owls continue to inspire helicopters; how the maple seed has inspired unmanned aerial vehicles.

College football pregame show with Urban Meyer, Mark Ingram, Matt Leinart, Brady Quinn and Dave Portnoy. Led by Rob Stone, the group analyzes the biggest games, with special attention to the "Big Noon Saturday" game on FOX.

From Huntington Bank Stadium in Minneapolis.

Paid programming.

Paid programming.

New Mexico Crime files will take you back for a deep dive into some of the most notorious crimes in the state. We will take you from the initial arrest and tell you what happened to the case. We will highlight crimes that you may remember and some that you never knew happened. Join Jessica Garate and Dean Staley as they open the vault on the New Mexico Crime Files.

The Emmy-winning quiz show features a unique answer-and-question format.

In a classic game-show version of "Hangman," contestants solve word puzzles for cash and prizes.

Learn what's behind mental decline with age, and how to improve memory, focus and concentration with NeuroQ's Darrin Peterson and Dale Bredesen MD.

Paid programming.

Paid programming.

From Folsom Field in Boulder, Colo.

From Casino Del Sol Stadium in Tucson, Ariz.