Nothing personal
@asyousay, but I'm getting sick of reading the word "trigger". Other than the technical meanings e.g. trigger a gun, "trigger" is commonly used for trauma survivors, e.g. the sound of a gun triggered an awful memory, a panic attack etc. OR trigger can be used to mean "to force somebody or something to do something" e.g. "the strike triggered such and such a response".
I'd say it's very far fetched to suggest that a parent dying could
trigger something like this alleged crime since on the one hand there's no immediate reaction as there is following a traumatic trigger (or a gun being triggered) and the other hand there is no "force" involved. Sorry to sound pedantic, but wording and language usage is important! Especially since using this "trigger" word, which is correctly used when somebody has been traumatised and is therefore a victim of at best natural forces (cyclones etc) at worst war, violence etc., can lend a vague suggestion that the defendant "couldn't help it".
A parent dying could be one of several causes including complex personality structure and life history of person that could unbalance somebody completely and lead them to abnormal behaviour, which could possibly include murder. But I still don't think "trigger" is the correct word here. Maybe "trigger" suggests more of a direct cause and effect than there could be in the case of this defendant.
IMO MOO
A previous poster a thread or two back (I can't remember who unfortunately but somebody with obvious knowledge of psychology) mentioned that the person would already need some deviant sexual thoughts or behaviour for it to arise due to 'stress'. IE wouldn't just suddenly occur all on its own, nor would murder. MOO IIRC
I hope I'm allowed to quote a dictionary
TRIGGER (verb) definition and synonyms | Macmillan Dictionary
Edited slightly to conform to sillybilly's request (I hope).