The extent to which youths understand their interrogation rights was examined. High school students (N = 160) from five different grades were presented with one of two Canadian youth waiver forms—varying widely in reading complexity—and tested on their knowledge of their legal rights. Results showed that comprehension of both waiver forms was equally deficient, and systematic misunderstandings of vital legal rights were discovered (e.g., the right to remain silent). There was also a positive linear relationship between high school grade level and amount of comprehension. Potential ways to enhance youths' understanding of their rights and provide them protection during interrogations are discussed. Copyright © 2014 John Wiley & Sons, Ltd.