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SUPREME INVESTIGATIONS Licensed Illinois Private Detective Agency
IDFPR Licensed 225 ILCS 447 Court-Ready Reporting Cook County & All of Illinois Bilingual EN · ES

Licensed Private Detective Agency  ·  Chicago, Illinois  ·  Serving Illinois Counsel

Investigative Support for Illinois Attorneys

Court deadlines do not wait. When your case needs field documentation that holds up, you need a licensed Illinois private detective who answers the phone, works the file personally, and delivers reports your associate can file without reformatting.

15+
Years of Investigative Experience
27,000+
Documented Surveillance Hours
7 Days
Available for Court Deadlines
Rule 901
Authentication-Ready Reporting

Supreme Investigations PLLC is a state-licensed Illinois private detective agency serving family law, civil litigation, insurance defense, personal injury, and probate counsel across Chicago and Chicagoland. Every engagement is handled personally by the licensed investigator — never subcontracted. Scope is confirmed in writing, reports are formatted for Rule 901, and the investigator is available for deposition and trial testimony.

Licensed by the State of Illinois: Supreme Investigations is licensed by IDFPR under 225 ILCS 447 (Agency #117.001922, Detective #115.002750) and is fully insured. Certificates of insurance are available to firms on request.

How We Work With Your Firm

Privileged Intake & Conflict Check

You speak directly with Robin Valenzuela. A conflict check is run before any case detail is discussed, and the intake is treated as work-product material from the first call. NDAs are available on request.

Written Scope & Lawful Strategy

Objectives, methodology, legal constraints, retainer, and billing terms are confirmed in a written engagement letter before any fieldwork begins. No fieldwork outpaces the scope. IOLTA-compliant invoicing is available.

Execution With Real-Time Updates

The licensed investigator executes all fieldwork personally. Status updates come by phone, text, or encrypted email, coordinated through your designated firm contact. Paralegals and case managers can be designated after initial intake.

Delivery, Review & Testimony Prep

The final report and evidence package are delivered via your preferred secure method, and a pre-hearing review call is included. Testimony preparation and an exhibit walkthrough are available before any contested proceeding.

Practice Areas We Support

Family Law
Custody, Dissolution & Domestic Violence

We provide surveillance documentation for parenting-time disputes, cohabitation evidence under 750 ILCS 5/510, infidelity matters, and order-of-protection support under 750 ILCS 60. Reports are framed around the Best Interest factors.

Civil Litigation
Witness Location & Pre-Trial Fieldwork

We locate fact witnesses, serve evasive defendants under 735 ILCS 5/2-202, verify assets and employment, and develop on-the-ground evidence for motion practice and discovery.

Insurance Defense
Claimant Activity Surveillance

We conduct workers' compensation and bodily injury surveillance under 820 ILCS 305, delivering timestamped video, written activity logs, and reporting formatted for IWCC submission and SIU review.

Personal Injury
Liability Investigation & Witness Canvassing

We provide scene documentation, neighborhood canvassing, witness identification and recorded statements, and background development on adverse parties for plaintiff and defense work.

Probate & Elder Law
Heir Search, Capacity & Elder Abuse

We handle missing-heir locates, financial-exploitation documentation, and undue-influence investigations for contested estates and guardianship proceedings under 755 ILCS 5.

Criminal Defense
Defense Investigation & Witness Interviews

We conduct independent witness interviews, alibi development, scene reconstruction support, and background investigation on state witnesses under counsel's direction and work-product protection.

Investigative Services for Counsel

Manned Surveillance
Covert observation is documented with timestamped HD video, photographs, and a written chronological activity log authenticable under Rule 901.
Deliverable: Video, photos, written log
Unmanned Surveillance
Covert cameras placed in lawful public locations provide extended documentation, ideal for pattern-of-life evidence over multi-day windows without an on-site investigator.
Deliverable: Continuous footage, log
Special Process Serving
We serve process under 735 ILCS 5/2-202, including on evasive defendants and hard-to-serve subjects, with stakeout service when required.
Deliverable: Notarized affidavit of service
Witness Location & Skip Tracing
We locate fact witnesses, missing heirs, evasive defendants, and absent parents through lawful database research and field verification.
Deliverable: Locate report & verification
Recorded Witness Statements
In-person field interviews are captured by audio recording or written declaration, which helps preserve testimony, lock in cooperative witnesses, and support discovery.
Deliverable: Signed statement & recording
Background Investigations
We research criminal history, civil litigation history, employment and license verification, and social-media intelligence on parties, witnesses, and adverse experts.
Deliverable: Written background report
Asset Investigations
We identify real-property holdings, business interests, and vehicle registrations and conduct lifestyle-indicator analysis for collection, divorce, and judgment-enforcement matters.
Deliverable: Asset inventory report
Evidence Development
We provide neighborhood canvassing, scene documentation, photographic evidence collection, and corroborating-witness identification for motion practice.
Deliverable: Investigative summary & exhibits

Attorney Field Courier Services

Witness Contact & Notification
We make personal field contact with identified witnesses to inform them of pending legal matters, convey firm contact information, and prompt direct outreach to counsel.
Deliverable: Contact log, witness response memo
Correspondence Delivery
We hand-deliver attorney correspondence, demand letters, settlement offers, and legal notices with signature confirmation and a written proof-of-delivery memo.
Deliverable: Signed receipt, proof-of-delivery memo
Legal Document Transport
We securely transport exhibits, physical evidence, deposition transcripts, and discovery packages between law offices, courthouses, and expert witnesses under chain of custody.
Deliverable: Chain-of-custody log, delivery confirmation
Court Filing & Courthouse Runs
We handle same-day physical filing at Cook County Circuit Court, Daley Center, Leighton Criminal, and surrounding Chicagoland courthouses, and return file-stamped copies to your office.
Deliverable: File-stamped copy, filing confirmation
Records Retrieval
We retrieve, in person, court records, clerk's documents, recorded deeds, police reports, medical records releases, and FOIA materials from government agencies across Cook County.
Deliverable: Retrieved documents, retrieval memo
Deposition & Exhibit Delivery
We transport and hand-deliver deposition exhibits and pre-hearing materials to opposing counsel, court reporters, or expert witnesses, with confirmed receipt and a time-stamped log.
Deliverable: Delivery log, receipt confirmation
Specialized Item Delivery
We deliver items that require a licensed professional, including court-ordered property, keys in eviction and probate matters, personal property in guardianship cases, and other regulated items.
Deliverable: Delivery report, notarized receipt if required
Rush & After-Hours Delivery
We provide emergency field delivery seven days a week when courthouse close time is approaching, opposing counsel needs a document before morning, or a witness must be reached before leaving jurisdiction.
Deliverable: Timestamped delivery confirmation

What You Receive — Court-Ready Deliverables

Written Chronological Report
Each report is a plain-language narrative with date-stamped entries, location coordinates, and observed conduct, written for authentication under Illinois Rule of Evidence 901.
Timestamped Video & Photo Evidence
HD video and high-resolution photographs carry embedded date/time stamps with metadata preserved, and are delivered via secure encrypted transfer or on physical media on request.
Chain of Custody Documentation
A custodial log tracks the collection, storage, and transfer of every piece of evidence, supporting foundational testimony and rebutting tampering challenges.
Affidavit of Investigator
A notarized affidavit attests to methodology and observations and can be used on summary judgment, motions in limine, and protective-order petitions.
Notarized Service Affidavits
Service affidavits comply with 735 ILCS 5/2-203 and include attempt logs, GPS verification of service location, and physical-description corroboration for due-diligence challenges.
Hearing & Deposition Testimony
Robin is available as a fact witness for evidentiary hearings, depositions, and trial testimony, and pre-testimony case-preparation calls are included at no additional charge.

Why Illinois Counsel Engage Supreme Investigations

Direct Investigator Access
Every call reaches the licensed detective working your file. There are no intake coordinators, case managers, or message relays, which means faster decisions and cleaner privilege.
Reports Built for Court
Format, foundation, and chain-of-custody documentation are drafted for authentication under Rule 901 and entry as exhibits, not as generic field notes.
Court-Deadline Reliability
We are available seven days a week, with priority deployment for motion deadlines, evidentiary hearings, and contested proceedings on calendar.
Bilingual Field Capability
Robin conducts field interviews fluently in English and Spanish, which is critical for diverse witness pools, Cook County family matters, and immigrant-community canvassing.
Transparent, Predictable Billing
We offer flat rates and written retainers with no mileage or fuel surcharges and no hidden report fees. Invoicing is clean for trust-account compliance and client cost-shifting.
Testimony-Ready Investigator
Robin is available for deposition, evidentiary hearings, and trial testimony as a fact witness, and he testifies calmly and clearly, prepared on methodology and observations.

Attorney Engagement Pricing

Manned Surveillance
$200/hr
6-hour minimum · door-to-door · all-inclusive · no mileage or report fees
Process Serving
$225/svc
Standard · $650 evasive subjects · stakeout service quoted by scope
Background & Locate
$650+
Database research, written report, field verification when required
Courier & Field Delivery
$200/hr
All delivery types · incidentals at cost · rush accommodated

View Full Pricing & Retainer Terms →

Open a Case File or Schedule a Privileged Consultation

Court deadlines do not wait. Reach the licensed investigator handling your file directly — by phone, encrypted email, or secure intake. We are available seven days a week throughout Cook County and Illinois.

Confidential Case Intake (224) 366-9505 Email Case Discussion

Supreme Investigations PLLC · Agency #117.001922 · Detective #115.002750 · Licensed by IDFPR under 225 ILCS 447 · Chicago, Illinois · Se habla español