As crossovers go, it's a fair cop
Black Canary straddles both sides of the criminal fence and she is not the only superhero to be trained in the same skillset as detectives before deciding to do some serious moonlighting.
If, in this, it is seen to complement the science fiction and fantasy then one could just as easily do a census of such comic books involving a protagonist using deductive skills, apprehending someone with some fiendish plan, which will most likely be classed as a criminal act.
Horror/crime crossover is covered very nicely by (John Constantine) Hellblazer and wild west adventures just need to focus on law enforcers and outlaws;
With news that the US military are producing a comic book for Arab youth , one can only assume that someone somewhere believes that a propoganda war to secure a system for justice-based society is the way to avert the stalemate with insurgents and finally broker peace. But if this is how the military are bound to their morality, how different is the private dick? His brief isn't to make the world safe for democracy or big oil. Though I imagine this is an inadvertent consequence at times.
Solving a patricide could be as exciting as it gets.The Military Police feature in a feature like From Here To Eternity but the drama that plays out can't be so succintly portrayed in other media. At least I haven't seen any examples in comics. So I guess that leaves war crimes
Now is detective work adventure or not? It doesn't have to be restricted to mean streets, if Speed Saunders is anything to go by, detectives also operate on mean waterways. How far can they be international crimefighters without treading on the toes of spies or diplomats? Larry Steele to the rescue.
The promised action is displayed for all to see in this crime comic cover gallery
Ms Tree has drama woven through; this is seen as a strength in detective stories.