<![CDATA[Police interrogation records (Berita Acara Pemeriksaan/BAP), although composed in standard bureaucratic Indonesian, frequently embed verbatim quotations containing regional-language code-mixing. This study examines the types of speech acts and code-mixing patterns found in authentic BAP quotations and analyzes their relevance to the attainment of substantive justice in criminal proceedings. The data comprise 2 main BAP documents – a Domestic Violence/Battery case file and an Extortion/Bladed-Weapon case file – covering 2 cases: (1) Domestic Violence (KDRT)/Public Affray and (2) Extortion with Bladed-Weapon Threat. From this corpus, 32 data units (Data 1–32) of authentic, anonymized utterances were identified and classified. A qualitative descriptive method with a forensic-linguistic and document-analysis approach was employed. Findings show a dominance of directive (11) and expressive (10) speech acts, followed by assertive (8), commissive (2), and declarative (1) acts, with dominant Javanese ngoko–Indonesian code-mixing and occasional Sundanese lexical insertions in the dialect-contact area. The study concludes that verbatim recording of code-mixed utterances in BAP sustains the material-truth principle (Article 183 of the Indonesian Criminal Procedure Code) and thereby reinforces, rather than obscures, substantive justice.]]>
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