Fear in Germany for the drinks that cause nausea

In the 10 victims were a man offering drinks that cause nausea in Christmas markets in Berlin.
Today, a 33 year old and 31chroni girlfriend reported that last Wednesday of a mysterious man approached nearly 40 years and proposed to drink the health of the newborn child and offered a bottle of schnapps, as it did with previous victims.Having drank the drink, 31chroni and her partner felt sick and the young woman vomited.
The police announced today that it has in the hands of any evidence to identify him or the guilty.