Most of our past blogs have focused on helping the public navigate socioeconomic issues and explore the intersection between investigation, security, and current events. For our May blog, we’re stepping back from the day’s headlines to focus on a less flashy, yet essential, component of private investigation: trial preparation.
While trial preparation may not be as captivating to the layperson as exposing fraudsters, tracking grifters, or guarding against stalkers, it remains a vital part of private investigative work—especially for attorneys, process servers, and anyone involved in a criminal or civil case, regardless of which side they’re on.
Remember the movie The Verdict? Without the help of private investigator Mickey Morrissey (played by the late Jack Warden), Paul Newman’s character may never have won his malpractice case. That Hollywood example reflects real life: trial attorneys frequently rely on private investigators to ensure their cases are airtight when they hit the courtroom.
Whether it’s interviewing witnesses, gathering last-minute evidence, or serving critical legal documents, private investigators act as an extra set of eyes and ears—making sure every detail is accounted for, and evidence is factual and can be supported. Below, we’ll outline the most valuable ways PIs assist in trial preparation.

Locating and Contacting Witnesses
When an accident occurs, both the insurance company and the injured party need to identify and speak with witnesses as early as possible. In many civil cases, years can pass before a trial begins—during which time witnesses may relocate or change contact info.
Most attorneys don’t have access to specialized databases or the time to track these people down. That’s where PIs step in, equipped with the tools and skills to locate hard-to-find individuals.
Even when a witness is located, they may be hesitant to cooperate. Investigators know how to re-establish contact, build trust, or, when necessary, secure compliance with a subpoena. PIs are often better received than attorneys, helping to coax reluctant witnesses back into the fold. Investigators may even offer transportation to and from court or help prepare a witness for what to expect on the stand.
If a witness cannot be found or is uncooperative, a PI may be called to testify about efforts made to locate them or introduce earlier statements into evidence.
Service of Legal Documents
Serving subpoenas and other legal documents is a fundamental part of trial preparation—but not all service methods are created equal.
Many attorneys turn to process servers to reduce costs. However, process servers are not licensed investigators. Their job ends once they’ve made a few attempts at service. If a witness or business has moved, it’s not their job to find them.

Licensed private investigators, on the other hand, have both the authority and tools to locate and serve even evasive parties. And unlike process servers, PIs can testify in court about the service process if necessary—adding legal weight to their work.
While hiring a PI may come with a higher upfront cost, it can ultimately save time, prevent delays, and ensure that your case proceeds smoothly.
Trial Preparation Services
Private investigators are often the quiet force behind a well-prepared legal case. Their work can involve everything from conducting background checks on witnesses and adversaries to helping lawyers anticipate and counter opposing strategies.
Some PIs even conduct background research on jurors, helping legal teams assess potential biases or conflicts of interest. After a trial, a PI might be brought in to interview jurors—an important step in shaping an appeal.
Investigators have the ability to uncover misleading or fabricated evidence, dig into the opposition’s narrative, and provide attorneys with the insight needed to build strong counterarguments.

Conclusion
Whether it’s locating witnesses, verifying alibis, serving subpoenas, or assisting with jury selection, private investigators bring invaluable support to any trial. Their ability to uncover critical details and adapt under pressure makes them essential partners for any legal team.
At Integrated Security Services, we’ve been providing expert trial preparation services for over 40 years. If you’re an attorney—or someone working with one—our team is ready to help. Call us at 646-680-6058 or visit us online at www.intesecurity.com to learn more.

