Dateline is in the town of Petaluma, Calif. where two high-profile predator cases made national headlines. What would our hidden cameras find there? Again, we want to warn you that some of what you’re about to see is explicit. This report aired Friday, Sept. 29, and repeats Nov. 11, Saturday.

It's what prompted our entire series of predator investigations: Grown men sending graphic e-mails to young teenagers. And now, it's what has forced a powerful congressman out of office in the scandal that's consuming Washington. Representative Mark Foley of Florida is accused of having sexually explicit online chats with underage teens. Dateline's latest investigation also uncovers some prominent men caught in what police say are criminal acts. They, too, risk losing their jobs... and in some cases, perhaps even their freedom. Again, we want to warn you that some of what you’re about to see is explicit. This report airs Friday, Oct. 6.

A teen is killed by a bullet during a party and his friend loses his freedom to what he says is a lie.

Loved by many, attractive, bright and kind -- Mary Lynn Witherspoon lived a sweet, southern life anybody could envy -- until a young man obsessed by her decided to take it away

A preacher and a husband involved in bigamy says his wife ran away

Someone, we don't know who, posted an online warning that Dateline's hidden cameras are in the neighborhood. But think that stopped these men? We want to warn you that some of what you’re about to read is explicit. This report aired Tuesday, Jan. 30.

We're back in Long Beach, California, where the long arm of the law has reached out and grabbed more than 3 dozen men in just 3 days. And perhaps the most surprising arrest in our most recent investigation? It didn't happen overnight in our undercover house — it happened in broad daylight, in a public park. We want to warn you that some of what you’re about to see is explicit. This report aired Tuesday, Feb. 6.

More predators caught in Dateline’s phenomenal sting operation.

This report airs Tuesday, Feb. 20 on NBC.

Dateline's cameras are on the beach, and suspected predators are online. We want to warn you that some of what you’re about to see is explicit. This report airs Tuesday, Feb. 27 on NBC.

Dateline continues its investigation in Florida, where over the course of our four-day investigation, 21 suspected predators showed up at Dateline's undercover house on the beach. We want to warn you that some of what you’re about to see is explicit. This report airs Tuesday, March 6 on NBC.

Tonight we follow Chris Hansen behind the scenes of this remarkably popular series. Whether you love it or hate it, it's hard to look away. The personal accounts and some very memorable confrontations are equally riveting in this episode.

Chris Hansen embarks on a new series of investigations that takes him into real danger as he exposes internet cons via emails preying on people believing in promises of money from foreign sources.

Dateline's Chris Hansen goes on an undercover investigation that starts at a computer keyboard and travels across America and the Atlantic.

We’re on the hunt for a new kind of predator: Wendy, the apparent mastermind of an international identity theft ring. So far, the search had taking us taken us clear across the country and it’s about to take us around the world as we track down the crooks who steal your credit card and banking information to go on shopping sprees with your money.

This has to make you wonder if Dateline is the only way anyone is caught doing anything. Tonight, undercover cameras in Houston, Texas and reporter Victoria Corderi not only document the car thefts, but follow the car .

Three separate shootings in Albuquerque, N.M. left five dead.

Three separate shootings in Albuquerque, N.M. left five dead. Why wasn't a mentally ill man stopped before he started his brutal rampage?

A montage of personal and AP photos of mourning and support on the VT campus.

One woman's journey to identify her rapist and to bring him to justice.

Princes William and Harry discuss their mother, Princess Diana, and the benefit concert they plan to hold to commemorate the 10th anniversary of her death.

A preacher and his wife looked like they had a marriage mage in heaven - until a body was found in the parsonage.

A Day At The Beach The fascinating Chris Hansen Dateline undercover sting series continues with new episodes. Tonight, in a multimillion dollar home on a beach in New Jersey, predators are still pursuing underage children and Perverted Justice volunteers are still pursuing them.

On Nantucket Island, Mass., a couple, Beth Lochtefeld and Tom Toolan's, connection is instantaneous, but their summer romance takes a tragic turn; it seems like an open-and-shut case, but there's a surprise in store.

A young newlywed falls to her death from a 1,000 foot cliff. Did she fall accidentally?

When a husband is murdered, investigators discover a twisted tale of secrets, lies and infidelity.

A rare look at the frightening power of a charismatic killer, just 18 years old -- a teenage mastermind who convinces other kids to kill. Would even a hardened reporter covering his story get caught up in the spell?

In a court of Law, DNA evidence is a slam dunk proof of guilt. But not in this case involving identical twin brothers.