Press coverage of the inquest says .. the man, an ex-Para, had been diagnosed with severe psychotic depression with a history of suicidal ideation, and that his father, who was in the SAS, had died by suicide in his childhood.
(This is part of a quote upthread with back information about the person who undertook the campaign of threats and sabotaging of the land).
I put in an admiring word for Caradog Prichard (correct spelling this time) earlier. A Mabinogion alarm bell is ringing now with parts of the tale of Branwen and the Welsh figure of Efnysien. Owen Sheers' 'White Ravens' is also a beautiful read, putting these tales into a 20-21st C setting. From his version in English (so not going on the original), Efnysien is the trickster-borderline psychopath but made that way with a permanently broken mind because of brutalisation as a soldier. This is not to excuse anyone's actions or to wax lyrical with a 'See, the source of it all is Medieval, no less, this plays out again' but there is newish literature out there that, in my opinion, takes a place on the other end of the scale from the way this is presented.