1. "to have found her" refers to an event that was expected to have happened in the past. While it is obviously an infinitive, fundamentally the reason for the perfect tense is the same as in "we have found her".
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
contrapositionThank you for your detailed answer.Then, is "would have expected" not a conditional?What do you think it might be conditional on?