Sometimes people can’t explain the act, but at least can explain everything before and after it. With all serious mistakes that were made in my life, I can explain the thinking pattern, and the external advices I got, be it right or wrong. But there is one situation that I can never explain (cutting off my forelock when I was eleven). Kids do dumb things, but it was strange. I remember looking at myself in the mirror, I remember thinking of the coming-of-age-ceremony in old ages that I just read about, but the act itself was so momentously impulsive. It was not a blackout, just a flash of impulsivity and then the thought, hmm, even bangs won’t help.
So: I wonder if these guys’ acts, even with all preparations and thinking, were more or less impulsive. But one wishes that these murderers could explain what trail of thoughts and acts led them to this impulsive act.
Ted Bundy was able to explain his pattern of development (essentially, primed by pornography) shortly before the execution. (Before, he hoped to be spared, so he kept silent. One wishes he spoke before).
I suspect that dudes like BK or perhaps, MDM don’t/won’t talk because they are afraid of people thinking worse of them if we know. And then, they think, it will worsen their fate.
For example: we all suspect that MDM was stalking his ex’s social media, but I suspect the details may be more ugly.
However. In real life, perhaps, knowledge would help psychologists develop better CBT algorithms preventing people with similar obsessive tendencies from getting more destructive, be it of themselves and others. Also, I suspect that MDM’s obsessions came in waves, so it would be interesting to know what exacerbated the obsessions or, in contrary, distracted him from them.
But the problem is, these guys are lonely and unused to sharing their feelings. They could benefit from therapy, perhaps more than others, but they think they are above it. Until it is too late.