Look what my /bin/fortune came up with:
The Worst Jury
A murder trial at Manitoba in February 1978 was well advanced, when
one juror revealed that he was completely deaf and did not have the
remotest clue what was happening.
The judge, Mr. Justice Solomon, asked him if he had heard any
evidence at all and, when there was no reply, dismissed him.
The excitement which this caused was only equalled when a second
juror revealed that he spoke not a word of English. A fluent French
speaker, he exhibited great surprised when told, after two days, that he
was hearing a murder trial.
The trial was abandoned when a third juror said that he suffered
from both conditions, being simultaneously unversed in the English language
and nearly as deaf as the first juror.
The judge ordered a retrial.
-- Stephen Pile, "The Book of Heroic Failures"