Egeno II of Konradsburg (also Conradsburg) was a free knight of Konradsburg, in the northeast of the Harz region in Central Germany, near Ermsleben.
Adalbert was the advocate of Nienburg and Hagenrode and had been imprisoned from 1075 to 1077.
There may have been political motives or Egeno may have acquired Ascanian estates during Adalbert's time in captivity and the two parties ended up feuding.
Egeno was made to give up his family seat of Konradsburg to atone for the murder and the castle was turned into a Benedictine or Augustinian monastery.
According to legend, the stone cross of Westdorf recalls the crime.