By Brad Segall

PHILADELPHIA (CBS) — Lower Merion police are looking for a former employee of a cleaning company from Philadelphia whom they say swiped a valuable piece of art last week from a home on the Main Line.

Police are trying to track down Andrea Lawton, whom they say worked at a home in the 600 block of Black Rock Road in Bryn Mawr.

On Friday afternoon, according to police, other members of the cleaning crew saw the Lawton, 46, and another person take off from the home.

The owner told police a rare bust of Benjamin Franklin, reportedly worth about $3 million, was missing.

“We think that she may have thought it was something that she could pawn, however something like this is so extremely valuable that she would probably not have an outlet to get rid of it right now,” says Lower Merion police lieutenant Frank Higgins.

The bust is 28 inches tall, weighs about 25 pounds, and according to the homeowner is one of just four in existence.

Police believe Lawton and the other woman fled the scene in an older model red Chevrolet SUV.