Well, yes, the German government has been covering-up/lying, Virginia. Why else would the authorities have been left "speechless" by Merkel's admission? It was a radical departure from the official line.
"German officials have been left speechless by Chancellor Angela Merkel's comment that there are "no-go areas" in the country.
The notion there are places in Germany outsiders — including police — can't visit has previously been dismissed by officials."
The most egregious case of lying and (attempted) cover-up was when German authorities tried to suppress the news of mass molestations of women in Cologne and other major cities in Germany on New Year's Eve a couple of years ago.
https://en.wikipedia.org/wiki/New_Year%27s_Eve_sexual_assaults_in_Germany
And no, the "no-go zones" aren't simply high-crime areas, they are places where, for example, women can't go for fear of being molested (or worse) for being "immodestly dressed" according to Sharia law.