Who's Entitled to What Information About the Mueller Investigation? Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email The letter from Attorney General William Barr to Congress on the conclusions reached by special counsel Robert Mueller in the Russia probe photographed on Sunday, March 24, 2019. ( AP Photo ) Produced by Alexandra Botti Produced by GBH, PRX and WNYC Studios