Louisiana Trial Attorney New Orleans   Elizabeth B. Carpenter, Esq. -- New Orleans Criminal Defense   Grounds for Mistrial -- La Code of Criminal Procedure Article 775 A mistrial may be ordered, and in a jury case the jury dismissed, when: (1)  The defendant consents thereto; (2)  The jury is unable to agree upon a verdict; (3)  There is a legal defect in the proceedings which would make any judgment entered upon a verdict reversible as a matter of law; (4)  The court finds that the defendant does not have the mental capacity to proceed; (5)  It is physically impossible [...]