Activist claiming “Mexican Cartel Preying on Senior Citizens”

I just had a very pushy white man come to my door and claim he was an activist.  I did not let him in.  Has anyone else had this experience …. or know anything about the cartel preying on senior citizens?  I googled and found nothing.  I went to the window to see him leave, but he did not come out of the hallway immediately and then I noticed a police car outside.  I am wondering if this was some type of ploy and he waited until the car left.  I never did see him leave!!!