William J. Brennan, Jr., Jencks v. United States — Opinion of the Court
“ The impeachment of that testimony was singularly important to the petitioner. The value of the reports for impeachment purposes was highlighted by the admissions of both witnesses that they could not remember what reports were oral and what written, and by Matusow's admission: 'I don't recall what I put in my reports two or three years ago, written or oral, I don't know what they were.'Every experienced trial judge and trial lawyer knows the value for impeaching purposes of statements of the witness recording the events before time dulls treacherous memory. ”
