Jack Dorsey days, Dorsey worked occasionally as a fashion model. By age fourteen, Dorsey had become interested in dispatch routing. Some of the open-source software he created in the area of dispatch logistics is still used by many taxi cab companies. Dorsey attended the University of Missouri–Rolla for two-plus years (1995–1997) before transferring to New York University, but he dropped out in 1999, one semester short of graduating. He first came up with the idea that he developed as Twitter while studying at New York University. While working on dispatching as a programmer, Dorsey moved to California. In 2000, Dorsey started his
Sidney Dorsey to Brown's murder, but was unsuccessful. During his tenure as sheriff, Dorsey also served on the task force that looked into reopening the case of convicted child murderer Wayne Williams. Dorsey appeared as one of many, including some of the victims' relatives, who voiced public doubt of Williams's guilt of the murders. Dorsey is quoted as stating: ""Most people who are aware of the child murders believe as I do that Wayne Williams did not commit these crimes"". Williams was identified as the key suspect in the Atlanta Child Murders that occurred between 1979 and 1981. In January 1982, he