  We discuss the statistics involved in the legal case of the nurse Lucia de B.
in The Netherlands, 2003-2004. Lucia de B. witnessed an unusually high number
of incidents during her shifts, and the question arose as to whether this could
be attributed to chance. We discuss and criticise the statistical analysis of
Henk Elffers, a statistician who was asked by the prosecutor to write a
statistical report on the issue. We discuss several other possibilities for
statistical analysis. Our main point is that several statistical models exist,
leading to very different predictions, or perhaps different answers to
different questions. There is no such thing as a `best' statistical analysis.
