Phone Call It's not her job to question the sort of perfectly legal items people keep in their homes. She's not an art history major by any definition but a quick Google search tells her all she needs to know about the painting and the sort of people she'll be dealing with.
"The unit should be arriving any moment now. Another officer will be scene to assist. We're going to do what we can to get your painting back, sir. In the mean time I'd suggest notifying your insurance company."