The THIRD worst thing you can do once you hire a licensed Maryland Private Detective !
Once you have chatted with a few Private Investigators ( we recommend that you do that) pick the one that you trust and have chemistry with. A GOOD firm will give you advice and set up a game plan during your consultation. If you feel good about what they are saying then hire them. Agree on how often you will be updated. Let them know up front if you have additional expectations.
Once hired let them do their job. Don't call repeatedly asking for excessive updates. Don't change the game plan daily. This is a process and you need to allow the process to take place. Trust the expert that you hired !