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v) The difficulties in the investigation of the case (its complexity
in respect of the facts or the number of witnesses or accused, the
need to obtain evidence abroad, etc.).

(vi) The manner in which the investigation was conducted:

(a) the system of investigation applicable;

(b) the conduct of the investigation by the authorities (their
diligence in dealing with the case and the manner in which they
organised the investigation).

(vii) The conduct of the judicial authorities:

(a) in dealing with applications for release pending trial;

(b) in completing the trial.

3. The Commission considers that a rational plan of this kind makes
it possible to arrive at "a coherent interpretation without any
appearance of arbitrariness". It also remarks that the opinion to be
formulated in a particular dispute will be the result of an assessment
of all the factors. It may in fact happen that the application of
some criteria will tend to lead to the conclusion that a period of
detention was reasonable, whereas other criteria will suggest the
opposite and still others will not clearly point either way. The
overall conclusion is said then to depend on the relative value and
importance of the various factors; this does not rule out the
possibility that one of them alone may carry decisive weight in some
circumstances.
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