Legal analysis: In life practice, you usually press your fingerprint with your right index finger. "By handprint" and "by handprint" are also called fingerprints, handprints and handprints, and they are also called handprints among the people. Civil acts (signing contracts, borrowing money, borrowing money, etc.) when fingerprinting. ) It is the index finger of the right hand. It is customary to use the thumb of the right hand in criminal cases (it is not easy to leak).

Legal basis: Article 188 of the Criminal Procedure Rules of the People's Procuratorate shall make an interrogation record when interrogating a criminal suspect. The interrogation record shall be faithful to the original words, legible, detailed and specific, and submitted to the criminal suspect for verification. If the criminal suspect has no reading ability, it shall be read to him. If there are any omissions or errors in the records, they should be supplemented or corrected. If the criminal suspect thinks that there is no mistake in the interrogation record, he should sign, seal or fingerprint the record page by page, and write "I have read the above record (read it to me) and it is consistent with what I said" on the last page, and sign, seal, fingerprint and date it at the same time. If the criminal suspect refuses to sign, seal or fingerprint, the public prosecutor shall indicate it in the record. The procurator who interrogates shall also sign the record.