Dear Pitchess,
Welcome to the forum.
The comments below are, perhaps, an answer to your question ... from the very top.
All the best,
CoCo
Karl Adams, Writing Department overseer, wrote a letter to President Knorr (November 18, 1971), questioning the keeping of voluminous files containing embarrassing information on disfellowshipped persons. Even after individuals were reinstated, their files were retained:
"At the present time the names of even those reinstated are kept in the file, and bulky records are kept of their cases, labeled 'Do no destroy.' It seems tantamount to saying: 'We believe you are forgiven, but we are keeping a record of your sin.' Or like saying, 'Your sins are washed clean but we are storing the dirt in a jar with your name on the label.'"
Decades later the practice continues.
IN SEARCH OF CHRISTIAN FREEDOM, by Ray Franz, p. 324, footnote 22.
http://www.jehovahs-witness.net/jw/friends/164942/1/Do-not-destroy-your-file-after-reinstatement