Major investigative interviewing protocols such as the Cognitive Interview recommend that investigators build rapport with cooperative adult witnesses at the beginning of a police interview. Although research substantiates the benefits of rapport-building on the accuracy of child witness reports, few studies have examined whether similar benefits apply to adult witnesses. The present study investigated whether verbal rapport-building techniques increase adult witness report accuracy and decrease their susceptibility to post-event misinformation. One-hundred eleven college adults viewed a videotaped mock-crime, received post-event misinformation (or correct information) about the crime, and were subsequently interviewed by a research assistant who built rapport (or did not build rapport) before recalling the mock-crime. Results indicated that rapport-building increased the quality of witness recall by decreasing the percentage of inaccurate and misinformation reported, particularly in response to open-ended questions. We discuss implications and recommendations for law enforcement. Copyright © 2011 John Wiley & Sons, Ltd.