Georg Pazderski, who is known for his incendiary comments about refugees, said Trump "is clearly better informed than the German government about crime in Germany with the help of his intelligence agencies."
"When crimes such as theft, drug dealing and sexual assault are not reported or only to a very small degree because the victims are ashamed, then those crimes do not become part of the statistics," Pazderski said in Berlin.
He was responding to two tweets posted by Trump earlier this week which saw the US leader citing unrest within Germany's ruling coalition over migration to argue against the admission of refugees.
"The people of Germany are turning against their leadership as migration is rocking the already tenuous Berlin coalition," he tweeted Monday. "Crime in Germany is way up. Big mistake made all over Europe in allowing millions of people in who have so strongly and violently changed their culture!"
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"We don't want what is happening with immigration in Europe to happen with us!" Trump tweeted.
According to German Interior Ministry statistics, the crime rate was at its lowest since 1992 last year, when around 5.76 million crimes were registered in the country.
Taken as a percentage of the population, Germany's crime rate was at its lowest in 30 years. For every 700,000 residents there were fewer than 7,000 reported crimes.