H.B. No. 3664 seeks to improve the training and procedural guidelines for grand jurors in Texas by introducing a mandatory training course for prospective grand jurors. This training, detailed in the newly added Article 19A.1021, will cover essential aspects of grand jury service, including its purpose, selection process, and procedural deliberations. The course will be administered by the Office of Court Administration and may be offered online, ensuring accessibility for all potential jurors.

Additionally, the bill revises existing articles in the Code of Criminal Procedure to enhance the clarity of grand jury investigations and the rights of individuals involved. It prohibits grand juries from investigating individuals who have already been examined for the same offense unless new material evidence emerges. The legislation also emphasizes the confidentiality of grand jury proceedings and mandates that witnesses be informed of their rights prior to testifying. The new rules will take effect for grand jury proceedings starting on or after September 1, 2025, ensuring that ongoing cases remain governed by existing laws.

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