How to judge the legality of police investigation and evidence collection? (investigation and evidence collection)

Opinions of Guangdong full-time lawyer network:

1. The police can register their certificates and copy your telephone book for investigation and evidence collection. As a citizen, you should cooperate with the police to investigate and collect evidence. Investigation and evidence collection refers to the special activities and related compulsory measures taken by administrative organs in accordance with the law to find out the case, collect evidence and catch the violator.

2. The procedure of police investigation and evidence collection is: When two policemen are present, show their police officer's cards first. If it is a search, you must also show a search warrant. If they don't show their certificates according to law, you can refuse to investigate or search. Search refers to the search and inspection of the bodies, articles, residences and other relevant places of criminals, criminal suspects and people who may hide crimes or criminal evidence in order to collect criminal evidence.