article_snippet.sent: the letter - which was posted to his Twitter page - '
article_snippet.sent: the letter - which was posted to his Twitter page - has since been retweeted tens of thousands of times .
article_snippet.sent: USA Today reported. '
article_snippet.sent: No information about a memorial has yet been released, but Lawrenceburg Schools superintendent Karl Galey said on Twitter that schools will be prepared to assist staff and students with counseling.