Captian Jaggery uses Charlotte's identity to build his case by not letting her talk during the trial, and by interrupting her to make her give up, and to come to his side. Captain Jaggery also accused her of dropping the dirk and killing Mr. Hollybrass. He also said that since Mr. Hollybrass was holding her handkerchief she had to have done it. In the book it said that Charlotte the whole time was on the mast cutting the sails, so that meant that she couldn't have done it.