Yes, of course we can do this individually if we have the resources available and find relevant information to pass along to LE. Here is what our Rules State:
NOTE:
Websleuths does not condone members becoming personally involved in cases by initiating contact with family members, law enforcement, or the media. This does not preclude responding to a request for volunteers, or
utilizing proper channels to report valid information, i.e., "a tip", to law enforcement.
Rules - Etiquette & Information
But the problem is, most or all of us don’t have the investigative resources to dig into RT’s personal/financial/Herbalife affairs deeply enough to connect RT to BT’s disappearance. We certainly shouldn’t bombard LE with general Herbalife conspiracy theories (not that you are suggesting that). The family can suggest that LE look into RT and Herbalife or hire a PI to do that if they are truly convinced there is a connection.