GEPAN's official technical note documents the witness interview, site visits, plant sampling and biological analysis conducted after the October 1982 report in Laxou.
It is the primary investigative source and preserves both measured differences and the methodological cautions required to interpret them.
The note does not turn plant variation into proof of an unknown craft. Single-witness testimony, camera failure and biological confounders remain central limits. Original source: https://geipan.fr/sites/default/files/note_tech_17.pdf