There are many Facebook investigative groups out there. Each will have their own set of rules for entry. Be sure to answer the entry questions honestly and accurately. Below are the ones that I prefer.
The Skip Tracer is my primary group that I admin. Anyone is welcome to join that has an interest in skip tracing / investigating.
Professional Investigators is another group that I admin. For this group, you need a verifiable investigator profession to gain entry.
Nationwide Investigators is another group I help admin. As before, you need a verifiable investigator profession to gain entry.
The Private Security & Detective Network is for private security and professional investigators.
Private Investigators and Detective Agencies is a large public group. Because it’s public, there may be several bad actors involved. Investigators can find business here, though. Anyone can join.
Licensed Private Detectives is a group for private investigators with some exceptions determined by the admin.
SkipGuru’s Tribe is a group for skip tracers. It’s up to the admin’s discretion on who he lets in.
Licensed Private Investigators, Security Guards, & Bail Agents says it all in the name. You have to be in that category to join. Exceptions are give on a case by case basis. I assist in moderation.