I didn't see any account of heart attack in the article, going to Google to search on the Ukranian Mobster guy.
I have been trying to find an Italian news story approx Feb 2001 about the Italian Police finding snuff paedophile movies in the office of some major Italian Industrialist. Apparently for $50,ooo plus This Semion Mogilevich and his woman wil arrange for a movie to be made to your plot.There was also an Israeli connection but I cannot remeber all the details
It was also reported in the UK in Guardian, but they spelt his name wrong.
Apparently the Ukraine is a very scary place.