A murder victim's son was the first to suspect that his mother's death was the work of a serial killer.

Investigators hoped that cells found on a Styrofoam cup marks on a water faucet and the clues left on a secret videotape would reveal the true identity of a man who had eluded police for over a decade.

By 1991, 42-year-old Nancy Ludwig found what she was looking for in life, a husband who adored her and the career in the airline business.

She always wanted to be a flight attendant from when she was a young girl. Very outgoing, spontaneous, adventurous woman.

So why did she make such a good flight attendant?

During one of her out-of-town trips, an airline employee called Art Ludwig with some bad news.

It was some woman explained to me that there had been a problem in Detroit and I should get myself ready and get off the airport and they would meet me there and we would fly to Detroit.

Nancy Ludwig was found dead in her hotel room near the Detroit airport. She had been stabbed to death.

The evidence for the fact that she fought valiantly against her attacker.

She had such extreme defense wounds on her hands. You just couldn't help by getting a real feel for what she went through and that isn't really always the case at a crime scene.

Nancy's hands had been bound with twine.

This particular kind of twine is most frequently used in a gardening and landscaping.

Biological evidence revealed that Nancy had been sexually assaulted and the resigns, the killer spent a considerable amount of time inside the hotel room.

We found a bloody washclothed by the basin and we could see that he had showered in the tub.

He could not have walked out of the Hilton Hotel in bloody clothing.

One of the most unusual aspects of the crime was that Nancy's personal belongings were missing.

She arrived at the hotel with at least two suitcases and a purse, all of her jewelry, her watch, earrings or all remote from the room, including the trash can liner from the trash can.

On the night of the murder, another guest at the hotel noticed a man carrying airline-type luggage to his car.

Right outside his window underneath the parking lot light was what appeared to be Monte Carlo with somebody carrying toward an open trunk that looked to be northwest gear.

The suitcases and what not.

Amazingly, there were 2800 Monte Carlo automobiles registered in the Detroit area.

Every one of those 2800 owners, we ran lean to determine whether there were warrants or whether they had criminal records and tried to eliminate them that way.

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