[2] In 972 Richer was killed in an attack upon his apparent uncle, Wigfried, Bishop of Verdun, by a certain Count Sigebert in "Wandersalis".
[3] Scholars note the following evidence for the relationships: In 973, after the death of Richer, a Count "Richizo", appears in a Hainaut grant concerning Crespin Abbey.
[7][8] After Richer died there was a battle near Mons where Reginar IV and Lambert I attempted to take it over.
[9] It has been proposed, for example by Leon Vanderkindere, that he had at least one child, mentioned by Alpertus of Metz as a son of a "Richizo": However, it is argued by Hlawitschka that Richizo is a short form name for Richwin, and that Richwin was a different count, probably closely related to Richer.
This Richizo, thought to be Richwin, appears in a Hainaut record in 973, after the death of Richar.