The scene
An exhibition beneath the gardenThe exhibition occupies a shelter beneath the botanical garden. During the opening toast, a copper medal disappears from its central room.
Three assistants left the foyer and returned before the discovery. The shelter has a one-way route and doors with different access permissions.
What we know for certain
One of the three people entered, took the medal and left with it, without accomplices. They could not pass it through a closed door. There were no faults, alternative entrances, borrowed cards or doors held open.
The three accounts
Ana Beltrán
Lighting coordinator«I was given the blue card for the installation.»
Biel Ferrer
Gallery assistant«My green card lets me enter.»
Carla Rius
Storekeeper«The yellow card opens the exit to the foyer.»
Examine the evidence
0 of 5 openedOpening these five clues does not cost points.
01The route
The north door is the only entrance to the room. Its turnstile allows entry from the foyer but prevents anyone turning back.
02The exit
The south door is the only exit to the foyer. Its turnstile prevents entry from outside.
03The access list
Throughout the theft interval, north accepted blue or green cards; south accepted blue or yellow cards. Each door required a valid card, even from the inside.
04Before the toast
The guard checked that the room was empty and the medal present. All three people were together in the foyer at that point.
05Everyone back
Before the theft was discovered, a photograph shows all three in the foyer with their only card: Ana blue, Biel green, Carla yellow.