Actually, this picture sequence would appear to be fairly conclusive evidence--done in front of a number of onlookers, too.
https://nybreaking.com/banksys-new-artwork-is-stolen-two-men-remove-drone-stop-sign-in-south-london-street-just-an-hour-after-artist-confirmed-it-was-his-on-instagram/
Not the most sophisticated theft ever by any stretch of the imagination.
@Oliver Schick started
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Actually, this picture sequence would appear to be fairly conclusive evidence--done in front of a number of onlookers, too.
https://nybreaking.com/banksys-new-artwork-is-stolen-two-men-remove-drone-stop-sign-in-south-london-street-just-an-hour-after-artist-confirmed-it-was-his-on-instagram/
Not the most sophisticated theft ever by any stretch of the imagination.