When an anonymous official within the U.S. intelligence community filed an official whistleblower complaint about a call between President Donald Trump and Ukrainian President Volodymyr Zelenskiy, the government official charged with handling the complaint was the Inspector General of the Intelligence Community, Michael Atkinson.

It was the job of Inspector General Atkinson, who oversees internal complaints and violations within the intelligence agencies, to determine whether the complaint into Trump's behavior was "of urgent concern." As the letter details, Atkinson became aware of the whistleblower's complaint on August 12. By August 26, Atkinson had deemed the complaint was "credible" and "of urgent concern," and alerted Director of National Intelligence Joseph Maguire. Read Atkinson's full letter to Maguire below.

