Special counsel Robert Mueller may have every good reason to use part of the infamous “Steele dossier,” with careful discernment, as a legitimate source for his investigation into Russian-related misdeeds in the 2016 election.

A source that is unreliable on some fronts still can be reliable on others. Law enforcement organizations across the country legitimately and regularly use sketchy sources to develop leads which result in the arrest and just prosecution of criminals. Indeed, it’s par for the course.