I was bartending with Eileen Lonergan's sister, Anne, at the time of the incident. She told us that they had been in the peace corp, and were either finished or getting close to finished. She said that her sister kept journals, and there was nothing in them that indicated suicide. She said the dive gear was not damaged, and that was why there was some suspicion, even in the family, that they had planned it. Anne even half expected to hear from Eileen for a few days after. From what she told me, dive crew miscounted, never noticed anyone was missing until days later. Last time I talked to her (years ago, mind you) the family no longer felt it was a mysterious disappearance requiring further investigation. A dreadful error on the part of the dive crew.
And, the movie was truly awful. I was rooting for the sharks to go ahead and finish them so I could go to bed. A lot of folks in the media reported that it was really a thriller, quite scary. How odd that they would be wrong!