Fired FBI chief James Comey said Thursday that he felt compelled to document President Trump’s comments to him during a January sitdown at Trump Tower because he believed the president might later lie about what was discussed.

“I was alone with the president of the United States. I was talking about matters that touch on the FBI’s core responsibility and that related to the president-elect personally. Then [there was] the nature of the person. I was honestly concerned he might lie about the nature of our meeting, so I thought it really important to document,” Comey said.

The remarkable statement showed the level of distrust between Trump and Comey, who said he never documented any conversations with presidents Bush or Obama.

He also said it was up to the special counsel investigating Russian meddling in the election – and not him – to decide whether President Trump obstructed justice by asking him to deep six a part of the probe.