Authorities consider the common exploitation of women from Eastern Europe to be the main problem associated with the profession.It is thought that around two thirds of the country's 400,000 sex workers come from other countries, in 1999 only half of the prostitutes came from other countries.He died of a heart attack in 1991 in the prison of Rheinbach.
In 2002, the government changed the law in an effort to improve the legal situation of prostitutes.
However, the social stigmatization of prostitutes persists and many prostitutes continue to lead a double life.
After the end of World War II, during which his father was a prisoner of war, Kroll's family moved to North Rhine-Westphalia. Around 1960, Kroll went to Duisburg and found work as a toilet attendant for Mannesmann.
Afterwards he worked for Thyssen Industries and moved to 24 Friesen street, Laar, a district of Duisburg. Kroll was very particular about where he killed, only killing in the same place on a few occasions years apart.
Afterward he would strip the body and have intercourse with it, often masturbating over it again.
He would then mutilate and cut off pieces to be eaten later.
With the world's biggest inland harbor and its proximity to Düsseldorf International Airport, Duisburg has become an important venue for commerce and steel production.
Prostitution in Germany is legal, and so are brothels.
Instead he was charged with eight murders and one attempted murder.
In April 1982, after a 151-day trial, he was convicted on all counts and was given life sentence.
Upon returning home, he would have intercourse again with a rubber sex doll he had for this purpose.