How do police stations usually collect evidence?

Legal analysis: The public security organ shall immediately accept any citizen's abduction, report, complaint, report or criminal suspect's voluntary surrender, ask about the situation, and make a written record, which shall be signed and fingerprinted by the abductor, informant, accuser, informant and voluntary surrender after verification. When necessary, audio or video recordings shall be made.

Legal basis: Criminal Procedure Law of People's Republic of China (PRC).

Fifty-ninth witnesses must go through the public prosecutor to testify in court; Only after cross-examination and verification by the victim, defendant and defender can it be used as the basis for finalizing the case. If the court finds that a witness intentionally perjures or conceals criminal evidence, it shall deal with it according to law.

Article 60 Anyone who knows the circumstances of a case has the obligation to testify. A person who is physically and mentally defective or young, can't distinguish right from wrong and can't express correctly, can't be a witness.

Article 61 People's courts, people's procuratorates and public security organs shall ensure the safety of witnesses and their near relatives.

Threatening, insulting, beating or retaliating against witnesses and their close relatives, which constitutes a crime, shall be investigated for criminal responsibility according to law; If it is not serious enough for criminal punishment, it shall be given administrative punishment for public security according to law.

Article 62 In cases of crimes endangering national security, terrorist activities, organized crimes of underworld nature, drug crimes, etc., witnesses, expert witnesses and victims shall testify in the proceedings;

If the personal safety of himself or his near relatives is threatened, the people's courts, people's procuratorates and public security organs shall take one or more of the following protective measures:

(1) Not disclosing personal information such as real name, address and work unit;

(2) Taking measures such as not revealing appearance and true voice to testify in court;

(3) Prohibiting specific personnel from contacting witnesses, expert witnesses, victims and their close relatives;

(four) to take special protective measures for individuals and houses;

(5) Other necessary protective measures.

Witnesses, expert witnesses and victims who think that they or their close relatives are threatened by their personal safety because of testifying in court may request protection from the people's courts, people's procuratorates and public security organs.

People's courts, people's procuratorates and public security organs shall take protective measures according to law, and relevant units and individuals shall cooperate.