The simple answer to this question is, no, it is not illegal to hire a private investigator. In fact, anyone who wishes to hire a PI can do so with the same legality as hiring an attorney. However, although the act of hiring a PI is legal, clients (and their private investigators) can get into trouble as a result of illegal actions and carrying out unscrupulous requests. Before getting into the particulars, clients must understand that private investigators have no additional legal or law enforcement powers than any ordinary citizen has. So, if a PI gets hired, the client has brought on a private citizen to conduct an investigation.
At Cowan Investigations, Bob Cowan, founding detective and former Jersey City Chief of Police, knows the law and is experienced in carrying out entirely legal investigations and getting desired results. He has the skills, technology, and experience to stay within the law while collecting admissible evidence for cases involving child custody, alimony payments, and spousal infidelity. Additionally, Cowan turns down all requests he deems immoral or illegal, guaranteeing every case he handles is above-board.