Yes, as far as the international standards are concerned, clearly it is the safest one. Apart from this, the cops are very much trustworthy and are ready to offer help, anytime, anywhere.
The only thing you are supposed to do is call 100, if you have any problem, a rare instance. Doubtlessly, there is no reason to bother about the crime scenes in Germany. Feel free to move wherever you want in the country of Germany without safety concerns.