‘In the 1970s and 1980s, the German Democratic Republic’s
secret police – the Stasi – frequently labelled suspected
dissidents with highly radioactive chemicals so that agents
wearing concealed Geiger counters could keep tabs on them,
according to a paper by Klaus Becker, a leading radiation
protection expert.
It has long been suspected that the Stasi used radiation as a
weapon. Becker reports that “unusual non-medical X-ray
machines” in former political prisons could have been used for
covertly irradiating inmates.
Large doses of X-rays are thought to be behind the deaths
from cancer of a number of prominent dissidents.’ New Scientist