So, no physical detainment allowed. They can just say, FU! and walk away while you sputter................?
In Cali, if you hear a noise in your home, arm yourself and confront the burglar holding your tv, the burglar can set down your tv, turn his back on you and walk out the door.
All you can do is give a description to the cops of the event and car, if one was used by the burglar to escape.