At the beginning of "the black cat," the narrator doesn't explain what he did to deserve death as a consequence of his actions. what effect does this withholding of information create?

This technique used by the author might create a sense of suspense and wonder what would make the reader to keep on reading. It might be also used for the reader not to judge the character so fast because a lack of information. The narrator is even presenting himself as unreliable and he even plays with his sanity. 

She came about disguised as his ally deiphobus 

D. he provides practical ideas for recipies on cooking children in the kitchen