Behind bars, they beg for medical attention from a giant government contractor. For some, help doesn't come -- or it comes too late. A CNN investigation exposes preventable deaths and dangerous care that government agencies have failed to stop.

They were a farming family, a young hothead, and an aspiring engineer with nothing in common -- except a weapon that reached the San Francisco streets through unlicensed gun dealing.

A CNN investigation found that police departments across the country destroyed hundreds of rape kits before the statutes of limitations expired.

After two years investigating one of the longest-running mail frauds in history, we finally met the woman on the letters: the French psychic Maria Duval.

The Army got upgraded guns. For months, the public didn't. Now, law enforcement officers are suing over a pistol that can fire when you drop it.

Larry Nassar molested them. Now gymnasts describe a different kind of abuse by famed Olympic coach John Geddert.

She is 53 and trapped in a facility for the old. Her left arm hangs limply at her side; in the right she cradles a baby doll she named Little Missy. Saliva drips from the corner of her mouth as she talks about her invisible boyfriend.

Some of the victims can't speak. They rely on walkers and wheelchairs to leave their beds. They have been robbed of their memories. They come to nursing homes to be cared for.