SARAH MCCAMMON, HOST:
An officer with the U.S. Capitol Police was arrested and charged with obstruction of justice today. Federal prosecutors say the officer tipped off a suspect from the January 6 Capitol riot and told the person to delete Facebook photos showing them inside the building. Tom Dreisbach from NPR's investigations team has more and joins us now. Hi, Tom.
TOM DREISBACH, BYLINE: Hi, Sarah.
MCCAMMON: What can you tell us about what this officer allegedly did?