In simple terms, there are enough evidence or proof that one is
guilty of some crimes. This is used in criminal cases. And there is
no other way someone else did it, or some other circumstances
happened, except this one - that you are the one who is
guilty.
However, the judgement is still arbitrary, plus the court also
relies on arguments of the lawyers and many other factors.
So even if you are innocent, but proven guilty by these 'factors',
too bad for you.
You will have heard of wrong sentencing by courts, where they
overturned judgements on innocent people who were imprisoned for
long term.
Thats why some US states are against death sentence, because there
will be no return if any error or new evidence to the contrary turn
up in the future.
Pei wo kao peh till morning!