Who does Victor blame for the crime?

Great question! In the book Frankenstein by Mary Shelley, Victor blames himself for the crimes that occur.

After the creature discovers that the young boy he finds (William) is related to Victor, the creature kills the boy. Subsequently, the creature covers his guilt by blaming Justine (a family servant).

Despite Justine’s innocence, Justine falsely confesses that she is guilty. Victor realizes Justine’s innocence, but fails to attempt taking the blame himself or to convince the creature to accept the guilt. Consequently, Justine suffers the consequences and is killed. 

Although Justine was convicted, Victor believes that he is truly responsible. Victor believes that because he made the creature, he is responsible for William and Justine’s deaths. As the text reveals:

“Thus spoke my prophetic soul, as, torn by remorse, horror, and despair, I beheld those I loved spend vain sorrow upon the graves of William and Justine, the first hapless victims of my unhallowed arts.”

Therefore, Victor blames himself for the crimes that occur with William and Justine. Although Victor does not blame himself for abandoning the creature, Victor blames himself for making the creature, which soon leads to the crimes with William and Justine.