Beyond what's been mentioned, one of the things about Murder, She Wrote
that I liked was that not only did Jessica figure out who did it, but also she figured out why.
Even if it became trite, I still thought that the sympathy she often displayed for the killer, because of whatever sad story that had led them to murder, was kinda touching. Columbo
was often that way, and even more so, so maybe this was one of the touches from Levinson and Link.