It doesn't happen in Finland alone, i'd say in Nothern/West Europe it's becoming increasingly popular over the last decade.
And spin doctors over here created such a nice and softening term for it: "Familiedrama met dodelijke afloop" which translates into "Family tragedy with deadly ending."
We even have a wiki with all the cases:
(Beware it's in Dutch.)
Quite often the father commits the crime, and he is usually depressed because of any sort of occasion (get fired, etc..)