Anytime I have brought colleagues in to interview a candidate, during the introduction, I'll note that "Bob from devops will be joining us, but he may get calle

Anytime I have brought colleagues in to interview a candidate, during the introduction, I'll note that "Bob from devops will be joining us, but he may get called away" based on the circumstances however I would not appreciate a coworker stepping out without an explanation for the candidate as that would reflect horribly on the organization in my opinion.