MO Private Investigator cheat sheet

Chain of custody: a documented, unbroken record of every person who handled evidence, with date, time, purpose, and transfer signatures; any gap weakens admissibility and credibility.

Three investigative stages: preliminary (secure scene, identify witnesses, preserve evidence), follow-up (records, interviews, forensic analysis), and case resolution (report, referral, closure).

Interview vs. interrogation: interviews are non-accusatory information gathering; interrogations are accusatory and occur only after probable cause focuses on a specific subject.

Surveillance types: static (fixed observation point), mobile (moving with subject), and electronic (GPS, camera, tracking); each carries different legal limits and documentation needs.

Locate witnesses by canvass (systematic door-to-door), records (employment, DMV, utility), and social-network mapping; record every contact attempt even when unsuccessful.

Statute of limitations check is a threshold step: confirm the filing deadline for the underlying claim before investing resources in an investigation.

Skip tracing sequence: verify identity, then last known address, then relatives/associates, then public records, then surveillance; document each step in order.

Reportable activity threshold: an investigator must report suspected child abuse, elder abuse, or imminent threat of violence to appropriate authorities regardless of client instruction.

Missouri private investigator licensing is administered under Chapter 324, RSMo, with rules adopted by the Missouri Board of Private Investigator Examiners.

A license is required to engage in the private investigator business or to advertise as a private investigator in Missouri; unlicensed activity is a violation subject to discipline.

Licensing requirements typically include a minimum age, good moral character, no disqualifying criminal history, experience or training hours, and passage of the state examination.

Continuing education: licensees must complete board-approved CE hours each renewal cycle; keep certificates because the board may audit compliance.

License renewal is periodic; operating on an expired license is unlicensed activity and grounds for discipline.

A licensee must notify the board of changes in name, address, or qualifying status within the time set by board rule.

Firearms and concealed-carry authority are governed separately from the PI license; a PI license alone does not authorize carrying a weapon.

Record retention: case files, contracts, and evidence records must be kept for the period required by statute or board rule and made available on lawful request.

Best evidence rule: the original writing, recording, or photograph is required to prove its content unless a recognized exception applies.

Hearsay is an out-of-court statement offered for its truth; document statements with speaker, date, place, and context so counsel can assess admissibility.

Relevance requires that evidence tend to make a fact of consequence more or less probable; chain of custody supports authentication and weight, not relevance.

Photograph evidence: record date, time, location, camera, and photographer; preserve originals and unaltered metadata.

Reports should follow a factual structure: who, what, when, where, how, and what was done - written in first person, past tense, without opinion or speculation.

Contemporaneous notes are the foundation of the final report; do not destroy rough notes after drafting, as they may be discoverable.

Evidence log fields: item number, description, source, date/time collected, collector, storage location, and disposition.

Privilege and confidentiality: attorney work product and communications with counsel are protected; do not disclose case details to third parties without authorization.

Fiduciary duty: act in the client's lawful interest, disclose conflicts of interest, and never accept a fee for a result that requires unlawful conduct.

Prohibited conduct includes impersonating law enforcement, misrepresenting identity to obtain records, trespass, illegal wiretapping, and pretexting for financial records.

Confidentiality: client information is confidential; disclosure is permitted only with consent, when required by law, or to prevent imminent serious harm.

Conflict of interest: decline or withdraw when representing both sides of a matter or when a personal relationship compromises objectivity.

Contract essentials: scope of work, fee structure, expenses, termination, confidentiality, and deliverables should be in writing before work begins.

Testimony ethics: testify only to facts observed or verified; distinguish personal knowledge from information learned from others.

Billing integrity: itemize time and expenses accurately; do not bill for work not performed or inflate hours.

Licensure and advertising: do not advertise services you are not licensed to provide, and do not use titles implying law enforcement affiliation.