ABC News May 1, 2019

Read special counsel Robert Mueller's letter to Attorney General William Barr

WATCH: Attorney General William Barr to testify before Senate committee

In a letter made public just before Attorney General William Barr's testimony before the Senate Judiciary Committee Wednesday, special counsel Robert Mueller complained that the initial four-page summary of the probe's findings led to “public confusion about critical aspects of the results of our investigation.”

Read more of the special counsel's March 27 letter here.