Earlier quoted context omitted.
One avenue, couched in specifics of US law, but I presume the ideas have analogs in Germany's legal system: A battery occurs when a harmful physical contact occurs. Contact with a weapon is pretty much by definition battery. The use of such a drug in the commission of rape or other violent crimes would then be a very easily proven case. If the substance is present in a victim's body, then battery has occured, basical…
> If the substance is present in a victim's body There is a possibility that the accused has nothing to do with it, you still have to prove it wasn't some third party or the victim who procured and took the drug.
Does it actually work that way in the real world?