Harassment & Stalking Investigator · Chicago & Chicagoland · Licensed Illinois PI
When someone is following you, monitoring your movements, making repeated unwanted contact, or engaging in behavior that makes you fear for your safety, documentation is what gives Cook County judges, Chicago Police, and the Illinois State's Attorney's Office something to act on. Supreme Investigations builds the pattern-of-conduct record that emergency orders of protection, civil no-contact orders, and criminal stalking charges under 720 ILCS 5/12-7.3 require.
Authority that matters in court: we are licensed by the Illinois Department of Financial & Professional Regulation (IDFPR) under 225 ILCS 447 as Agency #117.001922 and Detective #115.002750, and we build pattern evidence to the standard required by 720 ILCS 5/12-7.3, 750 ILCS 60, and 740 ILCS 21.
Harassment and stalking are pattern crimes — a single incident rarely meets the legal threshold Illinois judges require to grant an emergency order of protection, civil no-contact order, or criminal stalking charge. What Cook County courts, Chicago Police, and the State's Attorney's Office need is a documented record of recurring behavior: who, what, when, where, and how often. At Supreme Investigations, we build that record methodically, lawfully, and with the evidentiary precision Illinois proceedings require. As a licensed Illinois private investigator (Agency #117.001922, Detective #115.002750), Robin Valenzuela handles every harassment and stalking case personally and serves Chicago, Cook County, DuPage County, Naperville, Schaumburg, Oak Park, Evanston, and all of Chicagoland. Whether you are a victim or an attorney looking for a harassment and stalking investigator in Chicago, you need documented pattern evidence that holds up in Cook County orders of protection and criminal stalking proceedings.
Many investigations involve multiple disciplines: Surveillance Investigator Chicago work documents behavior, Skip Tracing Chicago locates individuals, a Background Check Chicago establishes relationships and financial indicators, and a Process Server Chicago completes service once an address is verified. Handling these phases together ensures continuity, accuracy, and documentation structured for legal proceedings.
We document the subject's physical presence near the victim's home, workplace, school pickup, or other frequented locations, establishing a timestamped record of proximity and pattern across multiple observation sessions in Cook County and DuPage County.
We compile and organize a documented record of repeated unwanted contact, including calls, texts, emails, social media messages, and in-person approaches, structured chronologically for direct use in Illinois order of protection petitions, civil no-contact orders, and criminal stalking referrals.
When the harasser's identity is unknown or only partially known, we identify the individual through lawful database research, Illinois Secretary of State vehicle records, address verification, and field investigation before any law enforcement referral or civil filing is made.
Our written reports document all observed and researched activity and are formatted for Illinois emergency orders of protection, civil no-contact orders, Cook County stalking no-contact petitions, and referrals to Chicago Police or Illinois State Police.
Under the Illinois stalking statute, 720 ILCS 5/12-7.3, stalking requires two or more acts directed at the same person that would cause a reasonable person to fear for their safety, suffer emotional distress, or fear for the safety of a family member. A single incident — no matter how alarming — typically does not meet the legal threshold for a criminal charge. Civil orders of protection under the Illinois Domestic Violence Act (750 ILCS 60) and civil no-contact orders (740 ILCS 21) use harassment standards that also depend on a documented pattern. This is why pattern evidence — collected by a licensed Illinois investigator — is critical for a successful filing. We build that record correctly from the first session.
A client retained Supreme Investigations after a former partner had begun appearing near her home and workplace on a recurring basis. She had documented several incidents herself, but her family law attorney advised that the record needed corroboration from an independent licensed investigator to support an emergency order of protection petition in the Domestic Violence Division of Cook County Circuit Court.
We began by reviewing the client's existing incident log and identifying the locations and time windows where the subject had most frequently appeared. Surveillance was deployed across three sessions — two at the residential area and one near the workplace — during the time windows where prior contact had occurred.
The subject was documented in proximity to the client's residence on two of the three sessions, at times consistent with the client's prior reports. Timestamped video and a written activity log were delivered to the client's attorney, who filed for an emergency order of protection the following day. The order was granted.
Harassment and stalking situations escalate. A single consultation costs nothing and can help you understand what documentation is possible and what legal steps are available to you immediately in Illinois.
From the Loop and downtown Chicago to Cook County suburbs and the wider Chicagoland region, we provide responsive, professional harassment and stalking documentation when it matters most.
Supreme Investigations is a licensed Illinois private detective agency providing court-ready investigative services across Chicago and Chicagoland.
If you are represented by counsel, your attorney may contact us directly regarding scope, documentation requirements, and turnaround for active matters.