In criminal or civil cases, is it illegal for the police to lie or deny when interrogating criminal suspects, or to lie during court trials?

Lying in a trial or trial is of course illegal, depending on when it was said.

1. If it is a deliberate act of lying about a false case, it can be detained for more than five days and less than ten days according to Article 25 of the Law on Public Security Administration Punishment, and it can also be fined less than 500 yuan; If the circumstances are minor, they shall be detained for not more than five days or fined not more than five hundred yuan;

Second, if perjury is provided. Then according to Article 60 of the Law on Public Security Administration Punishment, you can be detained for more than five days and less than ten days, and you can also impose a fine of more than 200 yuan and less than 500 yuan.

If the circumstances are serious, he is suspected of perjury (if the circumstances are serious, he shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention, and to fixed-term imprisonment of not less than three years but not more than seven years) or cover-up (if the circumstances are serious, he shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or public surveillance, and fixed-term imprisonment of not less than three years but not more than ten years).

Third, whoever fabricates facts and falsely accuses others in an attempt to subject others to criminal investigation or public security administration punishment shall be detained for not more than five days or fined not more than 500 yuan according to Article 42 of the Law on Public Security Administration Punishment; If the circumstances are serious, they shall be detained for not less than five days but not more than ten days, and may also be fined not more than 500 yuan.

If the circumstances are serious, he is suspected of falsely accusing and framing, and shall be sentenced to fixed-term imprisonment of not more than three years or public surveillance, and if serious consequences are caused, he shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years.

Fourth, look at when it was said.

1. If it is a deliberate act of lying about a false case, it can be detained for more than five days and less than ten days according to Article 25 of the Law on Public Security Administration Punishment, and it can also be fined less than 500 yuan; If the circumstances are relatively minor, they shall be detained for not more than five days or fined not more than five hundred yuan:

Second, if perjury is provided. Then according to Article 60 of the Law on Public Security Administration Punishment, you can be detained for more than five days and less than ten days, and you can also impose a fine of more than 200 yuan and less than 500 yuan.

If the circumstances are serious, he is suspected of perjury (if the circumstances are serious, he shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention, and to fixed-term imprisonment of not less than three years but not more than seven years) or cover-up (if the circumstances are serious, he shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or public surveillance, and fixed-term imprisonment of not less than three years but not more than ten years).

Third, whoever fabricates facts and falsely accuses others in an attempt to subject others to criminal investigation or public security administration punishment shall be detained for not more than five days or fined not more than 500 yuan according to Article 42 of the Law on Public Security Administration Punishment; If the circumstances are serious, they shall be detained for not less than five days but not more than ten days, and may also be fined not more than 500 yuan.

If the circumstances are serious, he is suspected of falsely accusing and framing, and shall be sentenced to fixed-term imprisonment of not more than three years or public surveillance, and if serious consequences are caused, he shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years.

Four, lying to the court is generally suspected of perjury, for perjury, the people's court may impose a fine, judicial custody, serious transferred to the public security organs for filing. According to Article 111 of the Civil Procedure Law of People's Republic of China (PRC), if a litigant participant or other person commits one of the following acts, the people's court may impose a fine or detention according to the seriousness of the case; If a crime is constituted, criminal responsibility shall be investigated according to law.

-If you only conceal some information in the process of inquiry and interrogation, you will not be held accountable, but if you are punished, you will think it is a plot and decide the punishment scale.