Timeline

[Pantagruel]

"“President Trump is wrong that John Bolton didn’t say anything about the Trump-Ukraine Scandal at the time the President fired him. He said something to me," Engel said in his statement.

“He and I spoke by telephone on September 23," he added. "On that call, Ambassador Bolton suggested to me—unprompted—that the committee look into the recall of Ambassador Marie Yovanovitch. He strongly implied that something improper had occurred around her removal as our top diplomat in Kyiv."

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Sept. 24: House Speaker Nancy Pelosi announces that the House is moving forward with an official impeachment inquiry, saying, “No one is above the law.”

I'm thinking once Pelosi knew Bolton's testimony would corroborate the already secured evidence, she launched the Inquiry.