Hiring a private investigator is something that you may want to look into when you are having trouble coming up with concrete evidence yourself. However, private investigators cannot help in all situations, so it's important to know whether or not your situation merits it. Here are four situations in which a private investigator can help you:

1. Find Out Where Your Spouse is on Friday Nights: If your spouse mysteriously disappears on certain nights during the week and you are suspicious of an affair, you can hire a private investigator to find this out for you. You may want to do this if you are considering divorce. The evidence that the private investigator can draw up for you can help in your divorce case if it's taken to court. You cannot, however, use a private investigator to tap your spouse's phone and find out who she is talking to and what's being talked about because this is something that only law enforcement can do with the proper permits. 
2. Find Out if an Ex-Employee Has Stolen Your Client List: Most likely, when you hire employees for your company, you have them sign a document that states they will not steal the client list to give to a new employer or to grow their own business. If you are suspicious that an ex-employee is doing this, you can hire a private investigator to help you determine whether or not this is the case. Then you can use the evidence they have gathered in your court case against that employee. 
3. Find Out Who's Attacking Your Business Online: If your business's reputation is being attacked online, you are going to want to find out who is doing this. After all, you don't want this to affect your business's success. A private investigator can determine who this is based on computer data to help you know who to sue and bring to court. 
4. Find Out Who's Attacking You Online: There are many cyber bullies out there who come up with fake identities to bully other people. If this is happening to you or your own kids, then you need to find out who it is so that a stop can be put to it. A private investigator can help you in this situation, as well. This is especially important if it's your kids being attacked since cyber bullying often leads to higher risk of suicide or depression. 

When you know what type of situations you can hire a private investigator, you can be sure that you hire them for the right reasons.