When South Carolina was ranked as having the highest rate of women being killed by men, The Post and Courier of Charleston set out to explore why.
The newspaper began an investigation that prompted moves toward reform in South Carolina and on Monday won the Pulitzer Prize for public service.
The New York Times collected three Pulitzers, for investigative reporting, international reporting and photography. The Los Angeles Times won two, for feature writing and criticism.
The Seattle Times took the breaking news award for covering a mudslide that killed 43 people and exploring whether the disaster could have been prevented.
In arts categories, Anthony Doerr's "All the Light We Cannot See" won for fiction and Stephen Adly Guirgis's "Between Riverside and Crazy" won for drama.