Injustice affects us all, whether we are directly or indirectly touched by it. For example, if a rapist is never convicted of his crime because the victim has a disability and is not considered a credible witness in court, he will not be prosecuted and will go on raping without fear of the consequences... and the next victim could be your child, your spouse, your neighbor... or the next victim could be you. People with intellectual disabilities often obtain little or no advocacy once they become a victim or suspect of crime, perhaps due to the small amount of training and education that people in the intellectual disabilities field have regarding criminal justice issues and the small amount of training many professionals in the police and legal professions have about people with disabilities. Chapters of The Arc play a key role in helping victims and suspects get one step closer in obtaining justice. The goal of this Guide is to provide chapters with ideas on what can be done when involvement with the criminal justice system occurs. While there are a number of publications chapters can look to when attempting to advocate for someone with intellectual disabilities inside the criminal justice system, most focus either on offender/suspect issues or victim issues, but rarely both. By bringing these issues together in one Guide, advocates can refer to one resource for information as a beginning point in assisting victims and suspects. The five topics addressed include: (1) Responding to Victimization; (2) Responding to Arrest; (3) Answers to Commonly Asked Questions; (4) Justice Advocacy Programs within The Arc; and (5) Other Resources for Victims & Suspects. This booklet provides an overview of the criminal justice system (from the perspective of both a victim and a suspect) that will equip advocates with the knowledge and understanding needed to help people with disabilities and their families know what to do once they are in the justice system. Since the Guide is a web-based document, it will be updated periodically so that resources mentioned throughout the document remain current. A list of resources is included. (Contains 4 footnotes.) [Funding for this paper was provided by the Office for Victims of Crime (OVC). This paper was written in partnership with The National Organization for Victim Assistance (NOVA). The foreword was written by Robert Perske. ]