It is exactly what he was charged with doing.

Charges: 40 counts in all, including:

32 counts of unlawful retention of national defense information;
One count of conspiracy to obstruct justice;
One count of withholding a document or record;
One count of corruptly concealing a document or record
One count of concealing a document in a federal investigation
One count of scheme to conceal
One count of false statements and representations
One count of altering, destroying, mutilating or concealing an object
One count of corruptly altering, destroying, mutilating or concealing a document, record or other object