She could have checked what Helsingin Sanomat wrote about that incident. If she had enough research skills to do that, that is. They wrote three stories about it in 1993 (
https://www.hs.fi/kotimaa/art-2000003259322.html 1993-08-17,
https://www.hs.fi/kotimaa/art-2000003259590.html 1993.08-18, and
https://www.hs.fi/kotimaa/art-2000003265115.html 1993-09-08)
There aren't that many details. Basically, the police got a hint that someone had brought radioactive material to Finland via Estonia, they did a raid in Espoo and caught five men and a few grams of Californium-252 (though the first article messes that up as Californium-525). Of of the guys was a Russian nuclear physicist who had lost his job and was acting as an advisor in the operation.
The articles speculate that the Californium was intended to go to Germany.
The last article states that four of the men had been charged in court but I couldn't find articles reporting about the result of the trial.
One of the articles includes a paragraph:
"According to the prosecutor the smuggled piece was worth 21000 FIM. According to the statement by Radiation and Nuclear Safety Authority the piece is not dangerous and because its low radiation it is suitable mostly for scientific use".