"Point Nemo is the most isolated place in the world. It's in the middle of the South Pacific gyre, which is a massive rotating current that basically keeps any nutrients rich water from ever getting in. So there is no sea life anywhere to be found except for a few crabs and bacteria that live near some thermal vents on the ocean floor. It's so far away from any land that if you sailed there the closest people would be on the international space station. This is the location HP Lovecraft was describing when he provided the location of R’Lyeh where Cthulu and the other old ones love, although Lovecraft's coordinates were slightly off.
And in 1997 the loudest unidentified underwater sound ever recorded, known as "the bloop", originated near there. It was loud enough that it was recorded from multiple sensors 5000 miles apart and lasted for over a minute.
The prevailing theory is that it was ice cracking off the south pole but we don't actually know what caused it for sure."
Not a bad idea but you might want to avoid the word dumping.
Burial at sea is the more common term.
More likely than not the writer was referring to Hawley Harvey Crippen. Check out the article at www.thehistorypress.co.uk/articles/the-notorious-case-of-dr-crippen/