A Systematic Review of Sexual Assault Case Attrition in the United States from 2000 to 2020

This article systematically reviewed research findings of five sexual assault case outcomes (founding, arrest, referral to prosecution, charging, and conviction) between 2000 and 2020. Records were collected from PsychINFO and ProQuest and had to report at least one quantitative criminal justice outcome, include data from a U.S. sample and involve original research. Thirty-six records (288,066 sexual assault cases) were analyzed. Results were stratified by reported cases, referred cases, charged cases, and victim age. Studies show that 72.09% to 92.66% of sampled cases are founded (M = 89.21%), 17.73% to 53.42% result in arrest (M = 27.25%), 13.60% to 69.57% result in referral (M = 31.36%), 3.28% to 83.16% result in charging (M = 19.58%), and only 1.86% to 40.31% result in conviction (M = 8.28%). This considerable variability in case outcomes is related to differences in cases included or excluded (e.g., age criterion, only sampling cases with sexual assault kits); thus, these studies are not reflective of all sexual assault cases. Studies were most likely to report arrest rates, followed by charging, referral, conviction, and founding. Overall, we have a good picture of what attrition looks like in adolescent-adult sexual assault cases from the 1980s to early 2010s in the Midwest and Southern CA. More updated research in the remaining parts of the country is needed, particularly from rural locales. Specific recommendations for more precise measurement and reporting methods are provided to improve our understanding of attrition and strengthen where, how, and with whom interventions are needed.