In every false conviction case, there came a point in the investigation when an innocent person became a suspect. Despite the countless accounts of how this presumed guilt can start a chain reaction of confirmation bias that taints all stages of the criminal justice process, little is known about what triggers suspicion about the innocent person in the first place. Drawing from existing and to-be-created databases, the overarching goal of this project is to identify and understand what demographic, behavioral, and linguistic factors initially spark suspicion and trigger dangerous confirmation bias processes leading to false convictions. We focus on one of the earliest moments in which a person might become a suspect: when they call 911. A key hypothesis is that when witnesses’ behaviors violate expectations, people “morally typecast” the witness as less capable of being a victim and more capable of being a perpetrator. Increasing basic understanding on how these expectations are formed, how they are violated, and how they interact with witnesses’ gender and race, is a critical step towards predicting whether callers are ultimately charged with the crime they are reporting. Moreover, understanding how these processes emerge will be critical in developing state-of-the-art curriculum to educate police about their expectations’ accuracy and consequences, and to educate attorneys on defending clients they believe to be innocent. Given the serious consequences that false conviction