Investigator, Esq.

This article about the "mutual" parting of ways for the City of Henderson and the assistant city manager mentions that the City paid Littler Mendelson almost $11,000 to investigate claims of sexual harassment. This got us wondering how many of you perform investigative services as part of your law practice. We know many of you hire investigators, but do any of you do it yourself? Any recommendations or tips related to this part of the practice of law?