There shouldn’t be ‘sides’ here. It is one of the issues with our justice system. The French system is much more a search for truth.
To be honest, I am surprised we are all allowed to speculate on what seems to me to be an ongoing investigation. Maybe it is because the arguments are about the interpretation of the facts, maybe because it is not currently actively within the court system.
It is indeed a very curious case and, as with all of these type of complex cases, you will see experts disagree.
I would actually love to see a retrial where all the new experts could present the new interpretations to a jury.
However, evidence does include character and oral evidence. The attempts to discount psychological profiling and oral testimony, as if this were not evidence, is wrong. Whether an accused seems consistent and truthful will always be a part of any legal case, especially with no ‘smoking gun’.
Also, I am sympathetic with the idea that process should never trump justice. But, equally, you have to have process. Otherwise, especially in this day and age, a verdict will carry little weight if it can always be endlessly appealed. It will end up as a very weighted system if those who are either rich or sympathetic characters (so can raise money via go fund me etc) will get superior justice. It will also end up being racist by default.