Based in Naples,
Retained Across Florida
Direct line: (239) 571-1840 · GregoryGilbertson@proton.me
Attorney and law-firm inquiries only
Naples, Florida · State & Federal Practice · Nationwide Reach
Gilbertson Investigations Inc. keeps its office in Naples, and Professor Gilbertson is retained from that address by counsel across the state and across the country. A Florida firm gets a police practices expert on Florida time, working to the same record standards that govern every engagement, with a nationwide practice standing behind the opinion. Inquiries are accepted from attorneys and law firms; no opinions are offered to individuals, and no legal advice is given.
Three experts. Over 110 years.
Professor Gregory Gilbertson (Ret.), FBI Special Agent Christopher Holland (Ret.), and Sheriff Robert Snaza consult with attorneys nationwide regarding police practices and procedures, use of force, false arrest, police misconduct, criminal, and self-defense casework.
CEO & OwnerThirty-eight years in four uniforms: street cop, soldier, professor, investigator. More than 220 matters in 42 states and D.C. since 2014.
Full biography
ConsultantMore than thirty-five years in public safety: Sheriff of Lewis County, Washington, since his election in 2015, and six years as a commissioner of the state board that sets peace-officer training standards.
Full profile
ConsultantForty years of investigative casework, from patrolman in St. Louis County to the FBI in Chicago, and on to task forces in Afghanistan and Liberia. His work on the Idaho student murders is examined in Broken Plea, the New York Times bestseller by Christopher Whitcomb.
Full profileThe Hon. Richard A. Jones United States District Judge“Mr. Gilbertson’s qualifications demonstrate extensive experience in policing. His expansive work as a police officer in Georgia, with assignments as a SWAT team officer, juvenile court investigator, school resource officer, stakeout squad officer, senior patrolman, and patrolman; then a career as a tenured college professor and university lecturer teaching criminal justice courses to degree-seeking students at colleges and universities, and as a licensed private investigator conducting felony pretrial investigations for attorneys in Washington State in dozens of criminal cases, makes him unique in the field of police expert witnesses. The Court finds that, based on his experience, Mr. Gilbertson’s testimony can be expected to have a reliable basis in knowledge and experience of police practices.”
The Practice Is Based in Naples.
Gilbertson Investigations Inc. is based in Naples, Florida, and Professor Gilbertson works from that address for counsel throughout the state and throughout the country. He brings 38 years of criminal justice experience, gathered in uniform, in the classroom teaching the same standards officers are trained to meet, and in investigative casework for attorneys preparing matters for trial. The expert practice dates to 2014.
Inquiries are accepted from attorneys and law firms. Professor Gilbertson is not an attorney: he offers no legal advice, gives no opinions to individuals, and makes no attorney referrals. A person who believes a police practices question sits inside a case should retain counsel first, and counsel can bring the matter forward from there. Legal conclusions remain counsel's throughout; the expert addresses police practices and the standards those practices are measured against.
What Florida counsel get is a police practices expert on Florida time and the same record discipline applied in every other engagement, whichever side sends the file. Retentions come from plaintiff's counsel in civil rights matters, from the criminal defense bar, and from counsel defending officers and agencies. The analysis does not shift with the party who retains him: the same national standards, the same complete record, the same opinions, stated the same way. The retention path and the published terms are set out on the For Counsel page.
Testimony Admitted in the State Courts of Florida.
Professor Gilbertson's testimony has been admitted in the state courts of Florida. Florida matters appear in the practice file, criminal defense work among them, and the published Florida result below is drawn from it.
State of Florida v. Ivan Alberti Sierra, Murder 2nd Degree, Self Defense (Deposition), Dismissed.
Jacksonville, Miami Gardens and Orange County by their labels.
One of the seven Florida matters in the practice file names Jacksonville in the citation, and the agency that citation names is the Jacksonville Sheriff’s Office. One of the seven Florida matters in the practice file names Miami Gardens in the citation, and the agency that citation names is the City of Miami Gardens. One of the seven Florida matters in the practice file names Orange County in the citation, and the agency that citation names is the Sheriff of Orange County.
A matter is counted here only when its own citation names the place or an agency of it; nothing is inferred from a court, a docket or a judge. The published results, where there are any, are on the panel above and on the case history page.
The self-defense casework the page takes up below is not what these citations hold. The Jacksonville and Orange County citations are labeled police practices in the file, the first in the state courts and the second in federal court, and the Miami Gardens citation is a false arrest claim in the state courts.
Police practices is the name of the discipline itself rather than of one kind of claim, so a record under that label is read first for which practice the claim puts in issue, and the policies and procedures, the training and disciplinary records, the reports and the video answer that question, not the label. A false arrest claim fixes its own question, and the analysis anchors it to what was known at the time of the arrest, not to what came to light afterward. The false arrest expert witness page carries the false arrest side; a police practices matter is read across the practice areas listed below.
Self-Defense Casework in Florida.
Florida is a stand-your-ground state, and self-defense casework is a standing lane of this practice. It covers civilian and officer self-defense, whether the question comes up in a criminal prosecution or in a civil suit over a defensive use of force.
The framework, the case types and the scope of an engagement are set out on the self-defense and firearms expert witness page, and immunity matters are treated on the stand-your-ground immunity page. The doctrine itself is explained in stand-your-ground versus self-defense in the Library.
The Nationwide Record Behind the Address.
The Naples address fronts a nationwide practice. The casework spans 42 states and the District of Columbia, in civil rights litigation and in criminal defense, and that body of work is what a Florida firm reaches when it retains an expert who sits in Naples. The jurisdictional range is described further in the Library guide to the jurisdictions a nationwide expert covers.
The record is reviewed by Professor Gilbertson against national police standards and practices, agency policy, the involved officers' own training, and statute and case law. For matters that call for a second discipline, independent consultants are retained case-by-case: Sheriff Robert Snaza on command, policy and training, and FBI Special Agent Christopher Holland (Ret.) on crime scene analysis and investigative casework. Each reviews the record independently within his own discipline.
The deepest state record is Washington, and it has its own page, the Washington record. For the judicial treatment of the qualifications behind this work, the homepage sets out the court's ruling in Alvarez v. King County.
Retaining From Florida.
Every engagement opens with a conflict check, and counsel hears about a conflict immediately rather than late. A first inquiry holds nothing privileged, only what it takes to gauge fit and scope a review: case type and posture, jurisdiction and case number, the deadlines that matter, what the record holds so far, and the parties to run for conflicts. Privileged material is never exchanged by email. The Library note on what to send with a first inquiry covers it item by item.
After retention the record travels on physical media: a computer flash drive or an external hard drive, by mail or courier. Online sharing services are not used, and there is no upload portal to ask about. Depositions are taken by Zoom or a similar platform, so a Florida deposition does not wait on anyone's travel calendar. Reports require sixty days of advance notice, which means counsel working toward a Florida disclosure deadline should count backward from that date before the drive goes in the mail.
The published fee schedule, the travel terms and the discovery list counsel assembles all sit on the For Counsel page, and a Florida firm works from the same terms as a firm anywhere else. For a Florida trial date, travel runs on those published terms, and venues within driving distance are billed under the same published schedule. Retaining counsel remains responsible for the admissibility of reports and testimony, and no outcome is promised in any matter.
Counsel ask about Florida.
Is Professor Gilbertson available for Florida state-court matters?
Does he work for both plaintiff and defense counsel in Florida?
Can an individual retain him without an attorney?
What should a first inquiry from a Florida firm include?
Is self-defense casework accepted in Florida?
Who reviews the record on a Florida case?
Discuss a Florida matter.
Attorney and law-firm inquiries only. Conflicts are checked before anything substantive, and you will hear about a conflict immediately.
Inquiry sent.
You will hear back directly. If the matter is urgent, call (239) 571-1840.
Conflicts are checked before any substantive discussion. Please do not send privileged material with a first inquiry; after retention the record is exchanged on physical media. Gregory consults for attorneys and their staff only, and does not provide legal advice or attorney referrals to individuals.

