John Wendell could not be tried because he got another heart attack on the way to the hospital and could not be saved. Caroline quickly disappeared after her father's death, and she could never be found again.
Danny Swann attempted suicide in prison before the trial but was saved by the warden, and since then, he had been placed under maximum surveillance. Two months later, the court sentenced him to life imprisonment for the attempted murder of both L and Lily, mother and child.
He repeatedly asked through his lawyer to meet L, but the girl refused. London Schneider absolutely did not allow his wife to take any risks by meeting a criminal in prison.
To prevent unwanted things from happening in the future, London ordered Carl, his chief of intelligence, to investigate Caroline's whereabouts. He did not want the girl to suddenly appear and bothered his family.