Sari Horwitz joined The Post’s investigations unit in 2006 after 23 years at paper, where she has reported on crime, homeland security, education and social services. She has been awarded the Pulitzer Prize three times.In 2002, Sari shared the Pulitzer for investigative reporting for a series exposing the District’s role in the neglect and deaths of 229 children placed in protective care. The series prompted an overhaul of the child welfare system. Sari also co-wrote an investigation of D.C. police shootings that won the 1999 Pulitzer for public service and the 1999 Selden Ring Award for investigative reporting. In 2008, she was part of a team awarded the Pulitzer for breaking news coverage of the shooting rampage at Virginia Tech. She worked on a series about guns and violence in D.C. that was a Pulitzer finalist in 1992. In 2003, she co-authored the book “Sniper: Inside the Hunt for the Killers Who Terrorized the Nation.” She also co-authored the 2009 book, Finding Chandra: A True Washington Murder Mystery. Among Sari’s other awards are the Robert F. Kennedy Grand Prize for reporting on the disadvantaged and the Investigative Reporters and Editors Medal. She previously worked at Congressional Quarterly.

Sari is a native of Tucson, Ariz., graduated from Bryn Mawr College and holds a master’s degree in politics, philosophy and economics from Oxford University. She lives in Washington with her husband and daughter.