This study aims to examine how patrol officer and complaint characteristics influence the timeliness of completing police misconduct investigations. Further, it analyzes how the timeliness of the investigation influences the disposition and discipline of complaint investigations while controlling for relevant police officer and complaint characteristics. Data were collected from a Midwestern municipal police agency for all complaints filed against patrol officers from 2006-2015. The analyses in this study demonstrate that the nature of the complaint and number of police officers present influences the length of the investigation. This study also finds that police officer and complaint characteristics are relevant predictors of the disposition and discipline outcomes of complaint investigations. Policy implications are discussed.