Although he, too, works for Sotheby's, Joe Barbeiri is (almost certainly) NOT the broker involved here.

see? Here are just two of the thousands of Joe’s happy, satisfied clients, and not a dog leash or taser in view.

Couple escapes from high-end Sotheby’s broker who assaulted husband and tied a dog leash around the wife’s neck

Heck, Joe doesn’t even have a dog.