Something that sounded like a very poor quality recorded message played backwards. Called the number back immediately and got the "Disconnected" message, so it is spoofed. If I ever get elected to Congress, the first bill I will introduce will be to make it illegal to spoof numbers in caller IDs.
Too bad we already have that law. It is also too bad that criminals break the law so it doesn't really matter.https://www.federalregister.gov/documents/201 ... n-caller-id-act