In 2011, I began a dissertation research project with the goal of implementing and evaluating a peer-facilitated, bystander-focused sexual violence prevention program to determine its effectiveness at changing attitudes and behaviors related to sexual violence with university men who are at low- and high-risk of using sexually coercive behavior. Recently, bystander prevention interventions have become more widely used as programs that attempt to prevent sexual violence. Bystander interventions focus on men and women as bystanders to change social norms in a peer culture that supports abusive behaviors. Since these interventions have become more widespread, evaluation of these interventions is necessary to ensure their effectiveness. Few studies have examined the effectiveness of these interventions with high-risk populations, which is the focus of this dissertation study. A quasi-experimental research design utilizing pre-, post-, and follow-up surveys was used to compare the effectiveness of a bystander sexual violence prevention program with university males in intervention and comparison groups. This case study discusses the many facets of program evaluation that make it such a critical, yet challenging research methodology. Also presented in this case study are several practical tips to help future program evaluators avoid some of the pitfalls that were experienced as this project was conducted.