"Well, with Milley -- uh, let me see that, I'll show you an example. He said that I wanted to attack Iran. Isn't that amazing? I have a big pile of papers, this thing just came up. Look. This was him. They presented me this -- this is off the record, but -- they presented me this. This was him. This was the Defense Department and him," the transcript said. "We looked at some. This was him. This wasn't done by me, this was him. All sorts of stuff -- pages long, look. Wait a minute, let’s see here. I just found, isn’t that amazing? This totally wins my case, you know. Except it is like, highly confidential. Secret. This is secret information. Look, look at this. This was done by the military and given to me."
You don’t have to alter or destroy documents for it to be a criminal offense to possess them, that it is classified as obstruction to try to hide said documents when subpoenaed, or that when you show them to people (especially those without the necessary clearances or need to know) you are committing a criminal act.
en.wikipedia.org
In January 2015, The New York Times reported that the Federal Bureau of Investigation and the Justice Department had recommended bringing felony charges against Petraeus for providing classified information to Broadwell. Petraeus denied the allegations and was reported to have had no interest in a plea deal.[20] However, on Tuesday, March 3, 2015, the U.S. Justice Department announced that Petraeus agreed to plead guilty in federal court in Charlotte, North Carolina to a charge of unauthorized removal and retention of classified information.[210]
In the 15-page statement of facts filed by the government along with the plea agreement, the government stated that Petraeus had provided Broadwell access to documents containing Top Secret Sensitive Compartmented Information, had later moved those documents to his personal residence and stored them in an unsecured drawer, and had deliberately and intentionally lied to Federal investigators about both providing Broadwell access to the documents and their improper storage. These facts were acknowledged to be true by Petraeus as part of his plea agreement.[211]
You don’t have to alter or destroy documents for it to be a criminal offense to possess them, that it is classified as obstruction to try to hide said documents when subpoenaed, or that when you show them to people (especially those without the necessary clearances or need to know) you are committing a criminal act.
David Petraeus - Wikipedia
In January 2015, The New York Times reported that the Federal Bureau of Investigation and the Justice Department had recommended bringing felony charges against Petraeus for providing classified information to Broadwell. Petraeus denied the allegations and was reported to have had no interest in a plea deal.[20] However, on Tuesday, March 3, 2015, the U.S. Justice Department announced that Petraeus agreed to plead guilty in federal court in Charlotte, North Carolina to a charge of unauthorized removal and retention of classified information.[210]
In the 15-page statement of facts filed by the government along with the plea agreement, the government stated that Petraeus had provided Broadwell access to documents containing Top Secret Sensitive Compartmented Information, had later moved those documents to his personal residence and stored them in an unsecured drawer, and had deliberately and intentionally lied to Federal investigators about both providing Broadwell access to the documents and their improper storage. These facts were acknowledged to be true by Petraeus as part of his plea agreement.[211]