The suspects got the name because they would knock on the front door of a house to find out if anyone was home.
Police said they have recovered over 3,000 items from the burglaries, including ones in Encino and Tarzana. The items include jewelry and watches. Many of the items were found in a hidden compartment in a Beverly Hills home.
Investigators believe many of the stolen items were taken in burglaries committed throughout Southern California over the past two to three years.
People are urged to visit the Los Angeles Police Department's West Valley Station website to determine if any of their property is among the items recovered.
Victims who believe they recognize any of the items depicted on the website will need to complete an affidavit along with supporting documents or photographs and mail them to:
LAPD West Valley Station
19020 Vanowen Street
Reseda, CA 91335