Thanks y'all for your posts and links. Here's where I have a disconnect: the predominant theory here, with which I agree, seems to be that this was an accident caused by one or more factors. However, three articles posted on this thread indicate or imply that the retention pond was searched based on a tip generated by the FBI. That suggests to me that there was a witness who called this in. And if a witness called it in, why call the FBI instead of local LE? I wonder if the witness knew that this was Erica, knew the Feebies were on the case and therefore called them. Alternatively, I guess it's plausible that the Feds had some video footage, like from a satellite or private source, showing the accident and they don't want to talk about that. It just feels like something doesn't add up - if it was truly a freak accident that happened three weeks ago on a deserted street in the middle of the night, how did a tip suddenly materialize?