You completely misunderstood the point of my (pretty old) comment. What I was criticizing was the (in my opinion) unrealistic attempt to show a more "human" side of the murderers at the end. Odagiri is especially despicable because he posed as a teacher, seduced a (underage) student by making her believe he was truly in love with her, only to brutally kill her once she fulfilled her role even though she had nothing to do with the individuals who killed his family (other than being unfortunately related to one of them). I'm not shocked by any of this, Kindaichi is literally a series about people being murdered. I was simply surprised that at the end the writers tried to make us believe these two individuals were actually in love and that we should feel bad for their tragic romance. When they showed Odagiri crying for Wakaba it was way too sappy.
Personally I love this series, I enjoy how even the murderers are usually sympathetic or at least people you can understand (depending on the severity of their crime, obviously). But this particular case never convinced me much.
And you lost the point of human people.
People aren't completely white or black, they are complicated. There was never an atonement toward this two. Both of them suffered horrible deaths, there was just a "What if".
What if they lived like normal people without the weight of their parent's sins and vengeance?
But he, the man who was even the most broken and forced to be like that thanks to his mother, managed to find something to care about just to cry when he knew he was going to kill her.
A show of humanity, that shows how horrible but tragic a character he was.
Not everyone is raised good or better, there are complex people that never receive any help or support.
He was a horrible monster that to the surprise of all of us showed some humanity, something that is mostly forgotten to put the full face of an evil creature that is the reincarnation of evil themselves.
Detective Conan and Kindaichi case files, show us how complex the human mind and emotions are. When you don't have anything else but just vengeance or the need to get everything you want no matter what. there are two sides of the same coin.
There is no romanticism. Sometimes, the stories and people do be like that, tragic, but of course someone with the comfort of a good moral and safe places can't get that.
Look beyond that flagged justice system, only that way you will see how complex real humans are. They are ones that still deserve to die and disappear but knowing more the context, paints you a better picture to judge rather than being close minded in a moral sense that is just flawed.
Because if it was that easy, there wouldn't be any problems or wars in life.