Fenrir
Fenrir had been following the girl in the form of a crow. She had been followed by the man, which had given him an idea. He was thinking too small. Perhaps if he widened his victim to just outside the park, there would then be a favorable response. He could smell that they were both mutants.
Two dead mutants should do it, or at the very least one dead girl and an witness that was missing an arm. He watched and waited for the perfect opportunity.