NEW DELHI  It could be a story line worthy of “Law & Order,” the Indian version.

A technician reported last week that someone had tampered with a private helicopter of Anil Ambani, one of India’s wealthiest industrialists, while it was parked at a Mumbai airport. Then, on Tuesday, the technician, Bharat Borge, was found dead on railroad tracks in Mumbai. He was carrying a letter that mentioned the tampering investigation, Mr. Borge’s family and officials of Mr. Ambani’s company said.

Cut to the detectives arriving at the crime scene.

Debate raged in India on Wednesday over whether Mr. Borge had committed suicide, had been pushed or was yet another accidental victim of the trains, which kill an average of 10 people a day.

The case has become a cause célèbre in India, not just because of the mystery around the technician’s death but also because it involves Mr. Ambani, the billionaire chairman of the Reliance ADA Group, whose company straddles industries including telecommunications, energy and movies.

The Mumbai police were investigating both the tampering and Mr. Borge’s death. They said Wednesday that he had died of multiple fractures and a brain hemorrhage.