Parallel construction is about hiding methods, not motives or the actual transgression. What you’re describing is simply abuse of power: the cops don’t like the beat you’re reporting so they start ticketing you for going two over the speed limit.
I would argue that hiding methods is one way to obscure motives of those building the case against a defendant.
The specific discussion was related to a "wait-and-see" attitude in regards to the motives of the justice system of France (not the motives of the alleged perpetrator). The suggestion was that if this was politically motivated then that motive would be revealed once the discovery process began. However, if the French legal systems wants to hide a political motivation then they can use parallel construction to hide their methods, thus obscuring their motives.
Also, I didn't "describe" anything. I pointed to a Wikipedia article that, in part, declares parallel construction as supported by the Supreme Court of the US. So, at least in US law, it is not at all an abuse of power but rather a totally valid approach that law enforcement can take to build a case against someone. The entire reason I even know the terms is because it showed up so often in the TV show Law & Order.
