The systems for investigation and evidence collection in German courts realize the dual lawsuit goal——maintaining the court authority and safeguarding lawsuit right.

In the present practice of investigation and evidence collection against events related to people appealing for help in groups, public security organs face quite a lot of problems as to legal basis, awareness, object, emphasis, approaches, timing, and methods of evidence collection.

Investigation and evidence collection given for counsel is absolutely the rule of law needs of the community, but also to promote social progress and an important part of its necessity is obvious.