She was raped and then drowned before her body was found in the River Dreisam.
AN Afghan migrant has admitted the rape and murder of a medical student, who also worked voluntarily at a refugee centre.
On October 26 Mr Ladenburger and his wife Frederika placed a memorial notice for Maria in the Frankfurter Allgemeine newspaper.
It read: "Maria was for 19 years a singular ray of sunshine for our family, and that she will remain.
“We thank God for this gift, that he made you with us. We are sure that she is safe with him.”
A funeral requiem was held for Maria on October in Notre Dame des Graces Church in Brussels.
On December 6 this year Maria would have been 20.