Author thinks that voluntary surrender to justice about unspotted crime also concludes two conditions . one is that the subject must be the suspect controlled in the compulsory measure , thei accused , or the criminal in prison . the other is that what sub - ject truly confesses must be other crimes that the authorities do not probe before 准自首成立的两个条件是：其一，主体必须是被采取强制措施的犯罪嫌疑人、被告人或是正在服刑的罪犯；其二，必须如实供述司法机关尚未掌握的本人其他罪行。
During the process of investigation and interrogation , it is necessary to analyze their criminal motive and their recognition to their crimes , to judge whether their behavors fit for the characterteristics of mental disorder criminals and to deal with the case according to the laws through the criminals ' declaration 在侦查讯问过程中，通过犯罪嫌疑人对其犯罪的供述，分析其犯罪动机及其他们对犯罪的认识问题，来判断是否符合精神障碍者犯罪的特点，并依据法律的规定和要求对案件进行处理，是非常必要的。
