Tokens: It
must
also
be
borne
in
mind
that
the
practice
of
police
interception
leads
to
the
establishment
of
"
prosecution
"
files
which
thereafter
carry
the
risk
of
rendering
inoperative
the
rules
of
a
fair
trial
provided
for
under
Article
6
(
art
.
6
)
by
building
up
a
presumption
of
guilt
.
The
judicial
authorities
should
therefore
be
left
a
full
power
of
appreciation
over
the
field
of
decision
and
control
.
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