An Alabama man is suspected of killing his new wife on their 2003 honeymoon during a dive trip off the coast of Australia, and a photograph may have captured the young woman’s final moments, according to a report in The Daily Telegraph.

FBI officials and Australian police are questioning Gabe Watson, a certified rescue diver, about the death of his wife Tina during a dive below the surface of the Coral Sea off the Queensland coast.

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The picture, taken by two tourists apparently oblivious to the drama going on behind them, shows a diving instructor swimming towards Tina Watson in hopes of saving her life, the Daily Telegraph reports.

Watson, a certified rescue diver, raised the alarm when he surfaced, saying his wife had got into difficulty in strong currents. But police have expressed concerns about his account of the incident and are investigating his wife's death as a possible murder.

Watson has not been charged in connection with the incident and will give evidence to the Australian inquest via video-link from the US.

He has claimed hundreds of thousands of dollars compensation from a travel insurance company for the "mental anguish" he says he suffered after witnessing his wife's death. But U.S. police have officially named Watson as a murder suspect, the Daily Telegraph reports.

The FBI and two Queensland detectives seized his computer and other material in April this year.

Authorities say Watson has also given several differing reasons as to why he could not rescue his wife, all of which were contradictory to his qualifications as a rescue diver, according to the Daily Telegraph.