Since coming to The Post in 1997, she has written extensively about law enforcement, political corruption and guns, including an investigative series on firearms that tracked guns used to kill more than 500 police officers in the U.S. In 2015, her reporting revealed nearly 40 witnesses to crime in the D.C. area were killed for talking to authorities or out of fear that they might. Her national investigation in November found that nearly one person a week died after being Tasered by police. That story was part of the newspaper’s year-long series on police shootings.