How did the creature feel after killing William and framing Justine, and what does he tell Frankenstein about the locket?

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Creature feels empowered after killingand framing Justine. He has nothing against either of
them, as people. In fact, he originally planned on having William for a friend, before he
learned that the kid was related to . However,realizes that hurting these two will hurt Victor,
the one individual most responsible for the Creature's outcast place in the world.

The Creature projects its rage against mankind onto Justine. He tells Frankenstein that
he placed the locket on her to frame her for the crime. He feels he is receiving retribution for
how he will never have a woman look upon him with compassion. By allowing Justine to be framed
and executed for a wrong she did not commit, the Creature is getting vengeance for being treated
as a monster even before he committed a single wrongdoing.