A forensic exam, most commonly referred to as a Sexual Assault Forensic Exam (SAFE), is a medical examination conducted by a trained clinician after a person has experienced sexual assault. It serves two purposes at once: treating injuries and health concerns while also collecting biological evidence that could be used in a criminal investigation. The exam typically takes several hours and can be performed within seven days of an assault, though evidence quality is strongest in the first 72 hours.
What Happens During the Exam
The exam follows a structured sequence, but every step is voluntary. Before anything begins, the clinician introduces themselves, explains what to expect, describes how long the process will take, and obtains informed consent. You can decline any portion of the exam at any time without losing access to medical care. As stated on New York’s official consent form: “I understand that I may refuse to consent, or I may withdraw consent at any time for any portion of the examination.”
The first step is a detailed medical history, which includes questions about the assault itself. The clinician records your statements in your own words, in quotation marks. They’ll ask about the time, date, and location of the assault, what types of contact occurred, and what you did between the assault and arriving at the facility (showering, changing clothes, brushing teeth, eating, or drinking). These details aren’t judgmental. They help the examiner know where on the body to look for evidence and which collection methods will be most effective. You may also be asked whether you had consensual sexual contact in the five days prior, since this helps a lab distinguish DNA profiles.
Next comes a full head-to-toe physical examination. The clinician checks for injuries, documents them with photographs, and performs the evidence collection. This involves swabbing areas of the body where the perpetrator’s DNA (skin cells, saliva, semen) may be present. The kit itself varies by jurisdiction but generally contains swabs, test tubes, microscopic slides, and envelopes for collecting hairs and fibers. Your underwear is always collected if you consent, even if you changed after the assault, because body fluids can transfer to fabric. Other clothing worn during the assault is sealed separately in paper bags.
The examiner also collects a sample of your own DNA, usually by swabbing the inside of your cheek. This gives the crime lab a reference point to distinguish your DNA from any foreign DNA found on your body. If an oral assault occurred, the examiner collects oral swabs for foreign DNA first, then waits 15 to 20 minutes before taking the reference sample.
Medical Treatment Provided
The exam isn’t just about evidence. It’s also a medical visit, and treatment for immediate health concerns is part of the process. Clinicians offer preventive medications for sexually transmitted infections, which typically include antibiotics taken over seven days. If the assault could result in pregnancy, emergency contraception is offered. Depending on the circumstances, you may also be offered vaccination against hepatitis B and HPV, and in higher-risk situations, a course of HIV prevention medication that lasts up to 28 days.
Beyond physical treatment, the exam includes referrals for mental health support, including screening for suicidal thoughts, substance use concerns, and trauma counseling. These aren’t afterthoughts. They’re built into the standard protocol.
Who Performs the Exam
In many facilities, forensic exams are performed by a Sexual Assault Nurse Examiner, or SANE. These are registered nurses, nurse practitioners, or certified nurse midwives with at least three years of clinical experience who complete specialized training in forensic evidence collection. In Massachusetts, for example, the SANE certification program requires 48 hours of instruction over six weeks, including both virtual coursework and in-person clinical simulation days, followed by written and practical exams and a supervised precepting experience.
This training matters. SANE nurses are specifically taught to collect evidence in ways that hold up in court, to document injuries with forensic photography, and to conduct the exam in a way that minimizes re-traumatization. Not every hospital has a SANE nurse on staff, but many emergency departments can connect you with one or direct you to a facility that does.
How Evidence Is Handled Afterward
Every item of evidence follows a strict chain of custody. The person who collected the evidence initials and seals it. Each person who takes physical custody of any item must sign for it. The sealed kit is stored in a locked vault, cabinet, or room at a law enforcement agency, court, or lab until it’s needed for testing or trial. If the kit needs to be shipped, a trackable shipping method is required.
This chain of documentation ensures that no one can credibly claim the evidence was tampered with or contaminated, which is essential for it to be admissible in court. Even a single gap in the chain can give a defense attorney grounds to challenge the evidence.
The Time Window for Evidence Collection
The strongest evidence is collected within the first 72 hours (three days) after an assault, but forensic samples can still be gathered up to seven days afterward. If you’ve showered, changed clothes, or brushed your teeth since the assault, evidence may still be recoverable. Don’t let that stop you from going.
If more than seven days have passed, clinicians can still document and treat injuries, address health concerns, and provide referrals. And in many jurisdictions, you can report the assault to law enforcement at any time, even years later. Some places also offer the option of having evidence collected and stored (for up to a year in some programs) without filing a police report right away, giving you time to decide.
Cost and Payment
Under the Violence Against Women Act, states are incentivized to eliminate out-of-pocket costs for forensic exams. The goal of the federal framework is that survivors pay nothing, regardless of whether they choose to report the assault to police. How this works in practice varies by state. Some states pay directly through victim compensation funds, others use grants, but the guiding principle at the federal level is that the financial burden should not fall on the person who was assaulted.
Your Right to Control the Process
The single most important thing to know about a forensic exam is that you are in control of it. You can consent to the full exam, decline specific parts, or stop entirely at any point. Refusing one element (say, the pelvic exam) does not mean you lose access to the rest of the medical care or evidence collection. The clinician is trained to be flexible and adjust the process based on what you’re comfortable with. The exam exists to serve you, both medically and legally, on your terms.