Actual crimes: The successful murders of 18 people, including two children, his suicide, and the attempted murders of 21 people in total.

Mental crimes: He left his guilt behind after the first ten people, but he seems to still feel a little guilty about killing Eileen Galvin, since she reminds him of his mother. The most important thing he feels guilty about is failing to awaken his mother.

And of course, Walter is afraid of a certain red devil who made him do it.