People shocked by Donald Trump Jr.'s bizarre Instagram post about his dad's penis

It's always nice when family have your back - but not so nice when they have your back by eluding to your penis.

Yesterday (Friday 26 August), a 32-page redacted FBI affidavit was released, outlining the justification for the search on 8 August.

Though the document offers the most substantial description of the investigation, federal officials also redacted significant portions of it to protect the identity of witnesses and to avoid revealing sensitive investigative tactics.

The post got a lot of love from his followers, racking up more than 283,000 likes, but the wider internet was less impressed.

Sharing the post on Twitter, one person wrote: "Junior is one sick dude."

Another said: "Junior knowing the size of his Daddy's mushroom is the most disturbing thing I have seen today."

A third added: "Why would Junior know how big or how small his daddy is? That's disturbing in of itself."

US Magistrate Judge Bruce Reinhart ordered that the affidavit be made public due to the huge public interest, but said the Justice Department had made compelling arguments to leave sealed broad swathes of the document that, if disclosed, would reveal grand jury information; the identities of witnesses and 'uncharged parties'; and details about the investigation's 'strategy, direction, scope, sources and methods'.

14 of the 15 boxes recovered from Trump's estate earlier this year contained documents with classification markings, according to the affidavit.

Even in its redacted form, it contains additional details about an ongoing criminal investigation that has brought fresh legal peril for Trump just as he lays the groundwork for another presidential run.

It underscores the volume of sensitive government documents located at Mar-a-Lago and reveals FBI concerns that the records were being retained illegally.

"The government is conducting a criminal investigation concerning the improper removal and storage of classified information in unauthorised spaces, as well as the unlawful concealment or removal of government records," an FBI agent wrote on the first page of the affidavit in seeking a judge's permission for a warrant to search the property.

The affidavit does not provide new details about the 11 sets of classified records recovered during the 8 August search at Mar-a-Lago but instead concerns a separate batch of 15 boxes that the National Archives and Records Administration retrieved from the home in January.

In those boxes, according to the affidavit, officials located 184 documents bearing classification markings, including 25 documents marked as top secret.

And some of those classified records were mixed with other documents, including newspapers, magazines and miscellaneous print-outs, the affidavit says, citing a letter from the Archives.

Agents who inspected the boxes found markings related to information provided by confidential human sources as well as information related to the Foreign Intelligence Surveillance Act.