The whistleblower accusing President Donald Trump of pressuring the president of Ukraine to influence the 2020 U.S. election wrote in a complaint that he or she was unsure why Trump also asked the foreign leader to turn over a hacked computer server belonging to the Democratic National Committee.

In the complaint, released publicly on Thursday following a prolonged struggle between the White House and Democrats in Congress, the whistleblower said he or she did not understand Trump’s request that Ukraine locate and turn over a server used by the DNC during the 2016 presidential election and subsequently examined by CrowdStrike, a U.S. cybersecurity firm.

CrowdStrike helped the DNC investigate an intrusion of its systems that the firm eventually blamed on two Russian hacking groups, but there are no missing servers despite Trump’s allegation that one somehow ended up in Ukraine, a theory popular among conservative conspiracy theorists.

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According to a transcript of the July call between Trump and Ukrainian President Volodymyr Zelenskiy, which was released by the White House on Wednesday, Trump asked Zelenskiy to “find out what happened with this whole situation with Ukraine” as it relates to CrowdStrike and the purported missing server.