An episode of “Stargate: SG-1” some years back featured a character who committed murder and then used neato advanced technology to remove the memory of having done so from himself. Additionally, the ability to selectivelty alter or delete memories is a common idea in science fiction. If such memory-tinkering-tech was available, then it’s clear that, on occasion, people would use the technology to delete their own memories of having comitted crimes… either for the purposes of being able to pass lie detector tests (hit men might find this tech appealing) or because of feelings of guilt & remorse, especially in cases of crimes of passion.
The question would then become, what’s the proper legal punishment for someone who commits a crime of passion and then deletes the meory of the crime and the incidents that led up to it? Do you jail someone for a crime they don’t remember, and could not imagine themselves doing?
On the one hand, yeah, I can see the ethical problem there.
On the other hand, we regularly lock up drunk drivers and drugged-up jackholes who commit crimes and then cannot recall them once sober.
On the gripping hand, if we have the tech to delete memories, we might have the tech to *add* memories. Thus perhaps the memory of the crime could be re-installed… even if the memory has to be re-created from scratch.