{
  "case": "The missing balloon rig",
  "venue": "Lisbon hackathon, 16 May 2026",
  "people": [
    {
      "name": "Mara Velez",
      "lanyard": "yellow",
      "plate": "12-AB-34"
    },
    {
      "name": "Tomas Ruiz",
      "lanyard": "blue",
      "plate": "55-CD-77"
    },
    {
      "name": "Ines Carvalho",
      "lanyard": "yellow",
      "plate": null
    },
    {
      "name": "Hugo Brandt",
      "lanyard": "green",
      "plate": "90-EF-21"
    },
    {
      "name": "Sofia Lind",
      "lanyard": "yellow",
      "plate": "33-GH-09"
    },
    {
      "name": "Petar Ilic",
      "lanyard": "blue",
      "plate": "71-IJ-45"
    }
  ],
  "witnesses": [
    {
      "who": "Barista at the venue cafe",
      "statement": "The rig was still on its stand when I took a tray past the store room at ten past seven. By twenty to eight the stand was empty."
    },
    {
      "who": "Volunteer on the registration desk",
      "statement": "Whoever came out of the store room corridor carrying something bulky had a yellow lanyard. I did not see a face."
    },
    {
      "who": "Security guard, car park",
      "statement": "One car pulled out in a hurry just before quarter to eight. Everyone else was still parked when I locked the barrier at ten."
    },
    {
      "who": "Hackathon organiser",
      "statement": "Three people wear yellow lanyards this year: Mara Velez, Ines Carvalho and Sofia Lind. Mentors wear blue, volunteers green."
    }
  ]
}