Emails leaked and posted on WikiLeaks Tuesday show evidence that Hillary Clinton's campaign and the Department of Justice "colluded" during the investigation into the former secretary of state's use of a private email server, according to claims made by Donald Trump's campaign.

The campaign pointed to emails from May 2015 between Clinton spokesman Brian Fallon and multiple campaign officials that were among the nearly 1,200 emails released Tuesday. It is the latest in a series of leaks that targeted John Podesta, Clinton's campaign chairman. The veracity of the emails has not been confirmed.

"DOJ folks inform me there is a status hearing in this case this morning, so we could have a window into the judge's thinking about this proposed production schedule as quickly as today," Fallon wrote on May 19.

>> Related: WikiLeaks emails: Advisor suggests Clinton arm wrestle Trump to prove she has stamina

The correspondence "shows a level of collusion which calls into question the entire investigation into her private server," said Jason Miller, senior communications advisor for Trump.

"The Department of Justice must release all communications with the Clinton campaign and her allies as soon as possible in order to definitively prove their investigation was completely above board," he said.

>> Related: Fact-checking Hillary Clinton: Did FBI director say Clinton was 'truthful' about emails?

The leaked emails, however, don't necessarily show evidence of collusion. It was not immediately known who Fallon, who previously worked as a spokesman for the Department of Justice, spoke with to get scheduling information, but that information would be available to the public.

>> Related: FBI: No charges recommended in Clinton email investigation, Clinton responds

For his part, Trump called the revelations "unbelievable."

FBI Director James Comey in July recommended no charges be filed against Clinton in relation to the scandal, despite the fact that classified emails were sent and received on her private email server, leaving them potentially open to hackers.

Comey characterized Clinton and her staff's handling of the emails as "extremely careless" but, he added, there was no "clear evidence" that she intended to break the law.