You mean we have technology good enough to track, image and lock on targets to within feets but we can't locate coyotes with groups of a dozen people moving around?
The comparison with East Germany is inane. The GDR was a dying regime that didn't have the economic resources nor technological resources we have. Not to mention that the wall came crumbling down 20 years ago. In technological terms, that's 3 or 4 lifetimes.
Ultimately, there always will be a 'human factor' you can't control. But if you reduce every day occurrences to a bare minimum, then those start to stand out. Unfortunately there's no political will to actually act on this, on either party.