After a criminal case is filed, whether you can collect evidence by yourself as a party.

1. The parties to a criminal case can obtain evidence by themselves.

2. The parties to a criminal case refer to the defendant, the plaintiff and the defendant in criminal incidental civil cases.

3. The defendant in a criminal case can collect criminal evidence by himself or hire a defender; Plaintiffs and defendants in criminal incidental civil cases may collect civil evidence materials by themselves or by entrusting lawyers.

Extended data:

After a criminal case is filed, whether the parties can withdraw the lawsuit mainly depends on the type of case and the circumstances of the crime. If it is a public prosecution case, the parties cannot withdraw the lawsuit.

Criminal Procedure Law of the People's Republic of China

Article 15 In any of the following circumstances, criminal responsibility shall not be investigated, and if it has been investigated, the case shall be dismissed, or prosecution shall not be initiated, or the trial shall be terminated, or the case shall be declared innocent:

(a) if the circumstances are obviously minor and the harm is not great, it is not considered a crime;

(two) the crime has passed the limitation period;

(3) Being exempted from punishment by an amnesty order;

(4) Failing to tell or withdrawing a crime that should be dealt with only after being told according to the Criminal Law;

(5) The criminal suspect or defendant dies;

(six) other laws and regulations shall be exempted from criminal responsibility.

References:

Baidu Encyclopedia-Criminal Cases