Write an introduction letter for the following information:

Mr. Smith, a male elementary school teacher, is charged with molesting several female students at his school. Mr. Smith has worked at the school for many years and has always been regarded as an outstanding teacher. Mr. Smith decorates his classroom in Disney characters, brings treats for the children, and spends extra time with them assisting with classwork during recess and after school. He makes a lot of sacrifices of his personal time for the children. The District Attorneys' office is in need of an expert who can provide a psycho-behavioral description of those who prey upon school children. The expert will be asked to view depositions given by several alleged victims and provide an analysis. The District Attorney is also asking for guidance from the expert in formulating questions to be asked of Mr. Smith, the alleged victims, school administrators, and parents at the trial.