The Fundamentals of Surveillance For Rookie PIs
- Dave Amis
- May 28
- 5 min read
By Dave Amis, Texas PI, Founder of StriderPI Academy
Introduction: Why Surveillance is Still King
Hey rookie.
You want to know the first foundational skill every private investigator needs?
It's not OSINT. It's not report writing. It's surveillance.
This surprises some people. But here's the truth: no matter how good you get at computer-based investigation, there will always be cases where the only way to get critical information is to put eyes on a subject. Always. In-person. In the field. In real time.
That's what this guide is about.
My Experience in the Field
Since 2019, I've worked everything from fidelity cases to major financial fraud, attempted murder, missing children, Ponzi schemes. I've trained dozens of new PIs and worked cases alongside them, and surveillance has been the deciding factor in more of those cases than I can count.
Whether you see yourself as a field agent, an OSINT specialist, or both—you need to understand surveillance. Full stop.
Why Every PI Needs to Know Surveillance
Let's get something straight.
Even if you plan to sit in an office all day running OSINT, you still need to understand surveillance.
Why? Because cases don't care about your preferences.
Some subjects are too paranoid to trick over the phone. Some targets have scrubbed their digital footprint. Some cases only break one way—with eyes on the ground.
Surveillance: The Old School Skill With a New School Future
Surveillance has been around as long as investigations themselves.
But don't mistake "old school" for outdated.
In 2026, surveillance has gone high-tech: drones, remote cameras, AI-assisted tracking, and digital counter-surveillance tools are all part of the modern PI's toolkit.
The fundamentals, though? Those haven't changed.
Position, patience, and presence management are still what separates a great surveillance agent from a burned one.
The 80/20 Rule Applied to Surveillance
For most cases, the best results come from 80% OSINT and 20% fieldwork.
But that 20% often makes or breaks the case.
If you're running a team, you need to know what your field agents can and can't do. If you're flying solo, you need to be competent in both.
Either way, surveillance knowledge isn't optional—it's foundational.
The $7.5M Case That Proves It
Let me tell you about a fraud case that illustrates exactly why surveillance matters.
We were hunting a subject who had stolen $7.5 million.
Using OSINT, we narrowed the search to nine locations across three states. Smart guy. He knew how to hide.
We tried phone-based approaches through family members—undercover strategies, indirect contact. Nothing worked. The whole family was locked down. Paranoid. Probably in on it. The subject had clearly trained them well.
So we did what you do when everything else fails: we put boots on the ground.
We coordinated PIs across multiple locations, staged surveillance vehicles, planned the operation, and executed one location at a time.
We got lucky at location number two.
He walked out of an apartment building—owned by a relative—with his vehicle parked blocks away. Classic evasion.
He may have spotted one of our agents, because after our guy made an obvious departure (the "reverse birddog" tactic—more on that another time), the subject walked two blocks past open parking spaces to a vehicle registered to his sister. Slick operator. But we had him. Location confirmed. Vehicle confirmed. Identity confirmed.
Without surveillance? That case never gets solved.
The Four Types of Surveillance™ – What You Actually Need to Know
There are four types of surveillance every PI must understand. Master these and you'll be ready for 90% of field situations.
1. Static Surveillance
This is surveillance on a fixed location. A home, a business, a street corner.
In one infidelity case east of Austin, a bad address nearly killed the operation—but some creative thinking and help from a USPS carrier led to photographic confirmation of both subjects within 27 minutes. Static surveillance is all about patience, preparation, and knowing your location before the operation begins.
2. Mobile Surveillance
This is the follow. You're moving with a subject—on foot, in a vehicle, or both.
Mobile surveillance is both an art and a science. You can do it for years and still find room to improve. The best follows are invisible when the subject never knew you were there.
3. Foot Surveillance
Sometimes you park the car. Foot surveillance is used in pedestrian-heavy environments—urban areas, events, locations where a vehicle would burn your cover immediately.
Footwork demands a different skillset: blending in, managing distance, and knowing when to step off before you're made.
4. Electronic Surveillance
Cameras, GPS (where legally permitted), remote monitoring. Electronic surveillance extends your reach and allows for longer-term observation without physical presence.
It has limits, though. That's why we teach all four types. Every method has strengths and weaknesses. Knowing when to use which one is what makes a great investigator.
What to Look for in Private Investigator Surveillance Training
Some of the things you’ll want to look for in private investigator training if you want to learn surveillance are:
The four types of Surveillance: Mobile, Foot, Static, and Electronic
The Follow
Vehicle Set-Up and Camouflage
The 10-2, LOS, and Other Key Concepts
Primary, Secondary, & Tertiary Parties
Team Surveillance vs. Solo Surveillance
Undercover Operations
Surveillance Reporting
Real-world field exercises and scenario-based training
Texas private investigator licensing guidance and investigative best practices
If you’re looking for a private investigator school that covers surveillance, check to make sure it includes these things.
At StriderPI, we teach surveillance in person because you can't truly learn surveillance from videos alone. You learn it by doing it in the field with experienced investigators.
Surveillance Fundamentals: Your Gear, Your Edge
Good surveillance requires the right tools. Here's the kit I recommend for field agents starting out:
Canon Rebel T3 (refurbished is fine)
75–300mm Zoom Lens
Red Tactical Light
Smartphone
Tripod
Photo Processing Software
Laptop
Time-Stamp App (free)
LP Monocular
Black Screen or Netting for vehicle concealment
You don't need to break the bank. You need reliable gear that works when it counts.
One more thing: hydration. I once sat in a car in 95°F Texas heat for 37 minutes waiting on a subject. Three Fiji waters saved that stakeout. Pack more than you think you need.
How to Build Your Surveillance Game: The Bottom Line
Surveillance is a foundational skill for a reason.
It's not glamorous. It's often hours of nothing followed by seven seconds of everything. But when that seven seconds comes—when the subject walks out the door, when the vehicle moves, when the picture gets taken—it all makes sense.
If you want to become a private investigator, start here:
Learn surveillance first. Learn it right. Build from there.
See you out there, rookie.
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