I wholly admit that I don’t know. Just speculating, of course.
Oh its fun to think about, but to be honest I doubt it wasn’t a suicide.
A bottle of ether and a couple of cinder blocks is a whole lot safer than a forensic team with a fine tooth comb if someone did it.
If it was a professional suicide I would think a Hoffa type outcome would be better. I mean people would think she is a flight risk anyway, she disappears it is just assumed she is in Mexico and there is no investigation.