Sirdeaner says she doesn't believe Carl's suicide was premeditated. "I don't really think that he planned it," she says. "But I know on that day part of everything that happened, the girl did end up telling him that, 'You act like you're feminine.'"

Carl also left a note, but Sirdeaner says it did not say why he chose to take his life. In the note, Sirdeaner says Carl left his favorite toy to his sister. "He told everybody that, you know, he loved them very much. He said he was very sorry," she says. "He was looking out for his younger brother, Charles, and he didn't want him to have a difficult time."

Read a statement from Carl's school.