New York (CNN Business) The Hill on Wednesday released the findings of its months-long review into the work of John Solomon, the former executive at the outlet whose columns pushing right-wing conspiracy theories about Ukraine played a pivotal role in President Donald Trump's impeachment inquiry.

The findings of the investigation, which were announced in a memo posted online, were critical of both the work Solomon did while he was at The Hill and the editorial process that allowed the columns to be published.

The Hill said it had added editor's notes to Solomon's work on Ukraine.

"In some columns, there was context and/or disclosure that should have been included at the time of his writings," The Hill said. "In other cases, these editor's notes highlight what has been learned since Solomon's columns were initially published."

The Hill also acknowledged fault handling Solomon's work and said that its investigation has made it "reconsider some policies" and "reiterate guidelines" that were already in place.

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