Horowitz report stated that Crossfire Hurricane was properly predicated on basis of Downer tip relayed on p. 52. Although the tip is vague, Horowitz says is was sufficient as bar for opening investigations is low.
But there is a big problem. The tip relayed by Horowitz does not match what Downer has said that Papadopoulos told him. Let's look at how Downer describes what he heard.
One final point is that Papa has made all this far more complicated than it needed to be by constantly changing his story. Luckily we have a clip showing Downer's and Papa's accounts match.