Completion of investigation under default bail law depends on a valid police report, not awaited expert materials.

Investigation is treated as complete for Section 167(2) once the police file a report satisfying Section 173(2), even if expert reports or other accompanying documents mentioned in Section 173(5) are still awaited. The additional duty to forward those materials does not postpone completion of investigation or prevent the report from constituting a valid police report for cognizance under Section 190(1)(b). Any later production of expert material or documents may be dealt with through the court's powers to summon evidence, but it does not entitle the accused to default bail solely on that omission.

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Issues: Whether investigation is complete for purposes of Section 167(2) of the Code when the police report under Section 173(2) is filed without awaiting expert reports or without annexing documents and statements mentioned in Section 173(5), and whether such a report still constitutes a police report enabling cognizance under Section 190(1)(b).

Analysis: The expression "investigation" under Section 2(h) includes the collection of evidence and the formation of opinion by the investigating officer, but completion of investigation is to be judged by reference to the statutory police report contemplated by Section 173(2). That report requires the particulars set out in sub-section (2), while sub-section (5) only casts an additional duty to forward the listed documents and statements in cases to which Section 170 applies. The absence of expert reports does not prevent the investigation from being complete once the officer has collected the material required for the police report and forwarded the report in the prescribed form. The later production of expert material or other documents remains a matter governed by the Court's powers, including Sections 91 and 311, and does not postpone completion of investigation for the purpose of Section 167(2).

Conclusion: The police report remains a valid police report despite the absence of awaited expert reports or appended materials, and the investigation is not incomplete on that account.

Final Conclusion: The accused were not entitled to automatic release on bail merely because expert reports had not yet been received or attached when the police report was filed within time.

Ratio Decidendi: Investigation is complete for purposes of Section 167(2) once the police submit a report satisfying Section 173(2); omission of expert reports or other materials required to accompany the report under Section 173(5) does not by itself keep the investigation pending.

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