A well-known doctor was brutally attacked in his home.

Investigators discovered that telephone traffic near the victims' home increased substantially within seconds of the crime.

Those calls tracked with a sophisticated forensic computer program uncovered an international conspiracy.

Dr. Lewis Davidson was one of the most respected pediatricians in St. Petersburg, Florida.

At 38 years old, he was head of pediatric emergency medicine at the Bayfront Medical Center.

It was all about the patient, the baby, the toddler, the child.

He treated him each with utmost respect, never a snide comment, and he gave 100% of himself to each child.

And he was so smart, he was almost scary.

On January 25th, 1994, Dr. Davidson finished his work at the hospital and headed home to get some sleep.

Dr. Davidson's girlfriend stopped by his apartment later that day, and this is what she saw.

She had her own key to the apartment, and she used her key to enter the apartment, and as she walked in she saw this crime scene where stuff was just spewed all over the place.

She walked back and found him in the tub.

Dr. Davidson was dead in the bathtub. He had been beaten and apparently drowned.

Detective Mike Salona was assigned to the case. His identity is concealed because he's now working undercover.

The master bedroom closet had obviously been going through clothing, pulled off hangers thrown on the floor.

However, one of the items that was still in the closet was a garment bag, and the bottom of the garment bag was $20,000 in cash.

Meaning the motive wasn't robbery. The crime scene had been staged to make it appear to be robbery.

Davidson's girlfriend told police that the doctor had been receiving strange telephone calls at home over the past several weeks.

Sometimes they'll come in three in the morning, sometimes four in the morning. She says that someone calls and then hangs up looking just to see if there is somebody home in that apartment.

Investigators found their first piece of forensic evidence on a tile floor in the doctor's apartment.

Tile floors are very conducive to leaving evidence, especially shoe prints.

Tile is flat and non-porous, a perfect template for prints. So technicians dusted the area, and just as they expected, a shoe impression appeared.

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