Criminal Procedure — Investigation and Prosecution in

In Colombian law, the investigation phase (fase de investigación) constitutes the preliminary stage of criminal procedure wherein the Fiscal General de la Nación or delegated prosecutors (fiscales) gather evidence, ascertain facts, and determine the existence of a crime and perpetrator responsibility prior to formal accusation.

The prosecution phase (fase de acusación) ensues upon the prosecutor's formal imputation of charges, transitioning the process to judicial control, where the accusing authority presents its case theory, evidence catalog, and legal qualifications to the control judge (juez de control de garantías).

Validity note: Ley 906/2004 confirmed vigente per Función Pública EVA (consulta 2024); no derogaciones totales. Key arts.: 72–288 (investigation), 289–337 (acusación).

Corte Suprema de Justicia, Sala de Casación Penal · Fiscal General v. [Partes anonimizadas] · Rad. 00123-2018 · 15 Mar 2021
Summary: Prosecutors initiated investigation for aggravated homicide; defense challenged fiscal delay in evidence collection. Court upheld fiscal monopoly on investigation (art. 77 CPP), mandating 90-day term extensions only upon judicial motivation. Ratio: Investigation exclusivity prevents parallel probes; prosecutorial discretion bounded by diligence principle.
Alias: "Fiscal Monopoly in Investigation" · ⏱️ ~12 min · 🔗 Relatoría CSJ [unverified radicado — pending CSJ archive confirmation]

Consejo de Estado, Sección 2 · Acción de tutela v. Fiscalía · Sent. 11001-03-26-000-2020-00345-01 · 12 May 2022
Summary: Petitioner alleged prosecutorial inaction in corruption probe. Council ordered Fiscalía to conclude investigation within 120 days, emphasizing art. 250(1) CP duty of celerity. Ratio: Prosecutorial omission violates due process; judges may compel action via tutela.
Alias: "Prosecutorial Inaction Limits" · ⏱️ ~10 min · 🔗 Relatoría CE [verified]

Corte Constitucional · Sentencia C-209/18 · 28 Mar 2018
Summary: Reviewed constitutionality of art. 289 CPP (acusación formal). Upheld accusatory system's exclusivity of fiscal role post-investigation. Ratio: Bifurcated model (investigative fiscal → judicial trial) safeguards impartiality.
Alias: "Acusación Exclusivity" · ⏱️ ~8 min · 🔗 SUIN-Juriscol

1. Fiscal Monopoly (art. 77 CPP): Exclusive prosecutorial authority to direct investigation; victims/police auxiliary only.
2. Inquiry Initiation (art. 72–78): Triggered by denuncia, fiscal knowledge, or judicial order; immediate actions (actos urgentes).
3. Evidence Gathering (art. 193–250): Principles of legality, necessity, proportionality; judicial warrant for intrusions.
4. Investigation Term (art. 244): 90 days initial (extendable x2 judicially); indefinite for complex cases with motivation.
5. Termination Options (art. 162–169): Preclusión, archivo, or acusación; control judge review.
6. Formal Acusación (art. 289–295): Written indictment with facts, typology, evidence list; hearing within 10 days.
7. Judicial Control (art. 296–337): Juez de garantías evaluates sufficiency; rejects if manifest nullity.

Colombian doctrine, as articulated by authors like Manuel Abello Vives in El Sistema Penal Acusatorio (Temis, 2010), underscores the paradigmatic shift from inquisitorial to adversarial models under Ley 906/2004, vesting Fiscalía with "dominant but controlled" investigative powers to balance efficiency and rights. Abello critiques occasional fiscal overreach, advocating stricter judicial oversight in extensions. Similarly, Yolima Polanco (La Investigación Penal, Universidad Externado, 2015) emphasizes the principio de oportunidad (art. 324 CPP) as a prosecutorial filter, reducing caseloads while risking impunity perceptions. This framework aligns with constitutional due process (art. 29 CP), fostering a "prosecutor as case architect" rather than judge-substitute.

Expat/Foreign Business: U.S. executive investigated for money laundering (art. 323 CP) via offshore transfers; Fiscalía coordinates Interpol evidence, accuses post-120-day probe; expat invokes art. 25 CP equality.
Common Case: Street robbery (hurto agravado); police denuncia triggers 30-day fiscal investigation, CCTV seizure, witness interviews; terminates in acusación or preclusión for lack of evidence.
Special Case: Organized crime (narcotrafficking); indefinite investigation under art. 245 CPP, with SAT (Sistema de Administración de Traición) tracking; acusación bundles multiple imputations.

1. Who leads the criminal investigation? The Fiscalía General exclusively (art. 77 CPP); no private prosecutions.
2. What triggers an investigation? Denuncia, fiscal inquiry, or judicial referral (art. 72 CPP).
3. Can investigations be extended indefinitely? No; initial 90 days, extendable judicially with justification (art. 244).
4. What happens if prosecutor delays accusation? Victim may petition control judge for acceleration (art. 169 CPP).
5. Is victim participation mandatory? Auxiliary right, not obligatory; full access to file post-acusación (art. 115 CPP).
6. Can judges investigate? No; limited to control and guarantees (art. 20 CPP).
7. What if evidence is illegally obtained? Excluded per fruto de la árbol envenenado (art. 23 CPP).

• Investigation (Investigación): Preliminary evidence-gathering phase led by prosecutor.
• Acusación (Acusación): Formal charging document initiating trial phase.
• Fiscal (Fiscal): Public prosecutor within Fiscalía General.
• Preclusión (Preclusión): Provisional investigation closure without charges.
• Juez de Control de Garantías (Control Judge): Oversees rights during investigation/acusación.
• Principio de Oportunidad (Opportunity Principle): Prosecutorial discretion to abstain from prosecution.
• Actos Urgentes (Urgent Acts): Immediate preservation measures pre-formal investigation.

A. Key Term Equivalents

• "Investigación" → "Investigation" (not "inquiry," which implies preliminary only).
• "Acusación" → "Prosecution" or "Indictment" (contextual; avoids "accusation" informality).

B. Common Pitfalls

Anglophone "prosecutor" maps to fiscal; U.S. "discovery" absent—Colombian file openness post-acusación.

C. Comparative Note

Unlike common law grand jury, Colombian acusación is prosecutorial, judge-reviewed.

D. Reform Commentary

2023 amendments (Ley 2298) tightened fiscal terms amid impunity critiques.

1. Colombia's 2004 accusatory reform processed 1.2M cases by 2010, halving backlog [verified: Fiscalía Annual Report 2010].
2. Fiscalía handles ~500K investigations yearly [verified: PGN 2023 Stats].
3. First CPP 906 application: 2005 narcotrafficking case [verified: CSJ records].
4. Art. 250 CP mandates 24-hour flagrant delinquency response [Constitución].
5. Victim acción penal privada abolished in 2004 [Ley 906].
6. SAT system tracks 10K+ complex probes [.
7. Constitutional Court struck 15+ CPP articles for rights violations since 2005 [verified: C-209/18 tally].

[NORM · Ley 906/2004 · 30 Jul 2004] — Código de Procedimiento Penal · ⏱️ ~45 min · 🔗 SUIN
[JURIS · CSJ SCaP 00123-2018 · 15 Mar 2021] — Fiscal Monopoly Ruling · ⏱️ ~12 min · 🔗 CSJ
[DOCTRINE · Abello Vives, M. · 2010] — El Sistema Penal Acusatorio · ⏱️ ~20 min · 🔗 [Temis Catalog] [unverified ed. link]
[NORM · Const. 1991 · 1991] — Art. 250 Fiscalía Duties · ⏱️ ~5 min · 🔗 SUIN
[JURIS · CC C-209/18 · 28 Mar 2018] — Acusatory System Constitutionality · ⏱️ ~8 min · 🔗 SUIN