Has one of the planet's richest people died without anyone noticing? The question has been raised after a US Treasury Department filing revealed a staggering $7 billion (£5.66 billion) flowed into its coffers on a single day.
The deposit was filed in the category of “estate and gift” taxes and was the highest collection of its kind of tax since at least 2005.
Due to strict privacy laws, the filer’s identity cannot be revealed.
