The world mourned. The empty space on the Louvre’s wall became a shrine, a testament to a loss that felt personal to millions [1]. Investigations led nowhere; even the poet Apollinaire and the painter Picasso were briefly swept up in the whirlwind of suspicion [1, 2].

If you search for on academic databases or document-sharing platforms, you will find a wealth of information. The most reliable PDFs often contain depositions from the Paris police, transcriptions of the trial, and photographic evidence of the vacant wall.