 Colvin wants Parenti to target younger age groups by showing him that violent behavior is entrenched in 18- to 21-year-olds.A visit to Colvin's old district and introduction to an 18-year-old criminal, who tries to assault Parenti for taking notes, convinces Parenti.Colvin and Parenti decide to focus on eighth grade middle school children and approach the Edward Tilghman middle school with their program.