They have done it with a fingerprint left on the device screen later on, if i remember correctly.
93 karma · joined May 23, 2017
They also managed to get the fingerprint of a politician via a high resolution picture taken at a speech. (Also a phone PIN via eye reflection captured by the front camera.)
In 2013 a CCC member broke TouchID access within a few hours after release of the IPhone. All needed was a photograph of the fingerprint on a glass surface. https://www.ccc.de/en/updates/2013/ccc-breaks-apple-touchid
Same method worked on the Iphone 6, as Apple hasn't changed a thing. Biometry is fundamentally broken.