CHM Capital Group - Stark Law Firm review: Fraud - lawsuit scam

A man named Peter Kelly calls from this number which the caller ID says: CHM Capital Group. He claims to be from Stark Law Firm and instantly spouts off a lawsuit case number and he's looking for so & so. Says we are related and needs to speak to him. I nicely asked For his name, place he's calling from, and what his phone number was again. Then responded that I don't know the person he's looking for please quit calling my number. He threatened that he knows where we live and work and will pursue efforts to contact the named person. Then hung up. Upon calling the number back its CHM capital group debt collections pretending to be a law firm. For all I know these people are complete frauds trying to steal people's identities or scam money by intimidation of lawsuits. (I should have asked him how Tony Stark is...you know Iron Man. Haha)