You can hire a PI if you want to try to litigate for alienation of affection or criminal conversation - but remember that in addition to the fees for the PI, you will also have large attorney fees to pursue this action.
Also, if this attorney is hiding his affair with your wife under the attorney client privilege, it will be a nightmare of a case to litigate. Best of luck.
Janet L. Fritts
Attorney with Rosen Divorce
4101 Lake Boone Trail, Suite 500
Raleigh, North Carolina 27607
The response posted above is based upon the limited factual information made available and is not intended as a full and complete response to the question. The only reliable manner to obtain complete and adequate legal advice is to consult with an attorney, fully explain your situation, and allow the attorney sufficient opportunity to research the applicable law and facts required to render an accurate opinion. The basic information provided above is intended as a public service but a full discussion with an attorney should be undertaken before taking any action.