A rape kit, formally called a sexual assault evidence kit (SAEK), is a collection of tools and containers used to gather biological and physical evidence from a person’s body after a sexual assault. The kit itself is a box or package containing swabs, collection envelopes, combs, and documentation forms. A trained healthcare provider uses these items during a forensic medical exam that typically lasts 2 to 6 hours. The evidence collected can later be tested for DNA and used to identify or prosecute an attacker.
What’s Inside the Kit
A standard kit contains everything a clinician needs to collect and preserve trace evidence from the body, clothing, and skin of the person being examined. This includes cotton swabs for collecting DNA from various body areas, paper bags for clothing, a comb for collecting foreign hair or fibers, and envelopes or containers for each sample. Every item is individually labeled and sealed to prevent contamination. The kit also includes detailed documentation forms where the examiner records findings, the patient’s account of what happened, and a step-by-step log of what was collected.
What Happens During the Exam
The forensic exam follows a structured sequence. It begins with an assessment of immediate medical needs: injuries are treated, and the patient is stabilized before any evidence collection starts. A clinician then takes a detailed history of the assault, asking questions that guide which samples need to be collected and from where on the body. These questions can feel invasive, but they serve a specific forensic purpose.
Next comes a full physical examination. The clinician looks for and documents injuries, sometimes using forensic photography to create a visual record. Swabs are taken from areas of the body relevant to the assault. Fingernail scrapings, hair combings, and clothing may also be collected depending on the circumstances. The entire process is guided by the patient’s consent. You can decline any part of the exam, take breaks, or stop entirely at any point. The exam is not an all-or-nothing process.
From start to finish, the exam takes anywhere from 2 to 6 hours depending on the complexity of the case and the medical care needed.
Who Performs the Exam
In many hospitals and clinics, the exam is performed by a Sexual Assault Nurse Examiner (SANE), a registered nurse with specialized forensic training. Becoming a SANE requires completing a 40-hour training program that includes both classroom instruction and clinical practice, on top of existing nursing experience in areas like emergency or critical care.
SANEs do more than collect evidence. They assess acute medical needs, offer information about sexually transmitted infections and pregnancy risk, provide referrals for follow-up care, and can later testify in court about their findings. In areas without a SANE on staff, other trained clinicians or Sexual Assault Forensic Examiners (SAFEs) may perform the exam instead.
Time Window for Evidence Collection
Evidence can be collected up to 120 hours (5 days) after an assault for adolescents and adults. For children 12 and under, the window is shorter: 72 hours (3 days) from the last suspected contact. These are general guidelines, and viable evidence has been recovered outside these windows in some cases. The sooner the exam happens, though, the better the chances of recovering usable DNA and trace evidence.
If you’re considering an exam, avoid showering, changing clothes, eating, drinking, or brushing your teeth beforehand if possible. These actions can wash away or degrade evidence. But if you’ve already done any of these things, an exam can still be worthwhile.
How the Evidence Gets Used
Once collection is complete, every piece of evidence stays sealed inside the kit. The examiner maintains custody of it throughout the exam and while any wet evidence is drying. The sealed kit is then transferred to law enforcement, and every handoff is documented with dates, times, and signatures. This chain of custody ensures the evidence remains legally admissible in court. Only crime laboratory personnel open the sealed kit for testing.
At the crime lab, DNA profiles developed from the kit’s swabs are entered into CODIS, the FBI’s national DNA database. The unknown profile from the evidence is compared against databases of convicted offenders and, in states that allow it, arrestees. If a match is found, the lab confirms it and identifies the suspect. The DNA profile is also compared against evidence from other unsolved cases, which can link a single perpetrator to multiple crimes. A database match alone doesn’t close a case, but it can establish probable cause for investigators to obtain a court-ordered DNA sample from a suspect, which then becomes direct evidence at trial.
Cost and Billing
Federal law requires that states cover the full out-of-pocket costs of a forensic medical exam for sexual assault survivors. This means you cannot be billed for the exam, whether you have insurance or not. If a state does bill a victim’s private insurance, any deductibles, copays, or denied claims must be paid by the state or another governmental entity. The cost never falls on the patient. Healthcare providers in each region are required to notify survivors that exams are available at no cost.
Reporting Is Not Required
Having a rape kit collected does not mean you have to file a police report. Many states allow “non-report” or anonymous kits, where evidence is collected and stored even if you haven’t decided whether to involve law enforcement. This preserves the option to pursue a case later while the evidence is still intact.
How long these unreported kits are stored varies dramatically by state. Federal law under the Sexual Assault Survivors’ Rights Act guarantees the right to have a kit preserved, without charge, for the shorter of 20 years or the length of the relevant statute of limitations. You also have the right to be warned at least 60 days before a kit is scheduled for disposal and can request an extension. In practice, state-level minimums range widely. Georgia, Indiana, Kentucky, Louisiana, Michigan, and South Dakota require storage for at least one year. Colorado, Pennsylvania, Texas, and Virginia require two years. Some jurisdictions have stored kits for as little as 30 days. Knowing your state’s retention period matters if you’re keeping your options open.
Your Rights During the Process
The exam is entirely patient-directed. You can consent to some parts and refuse others. You can ask questions at any point, request a break, or bring a support person with you. A victim advocate, either from the hospital or a local crisis center, is typically available to be present throughout the exam. The Department of Justice’s national protocol for these exams emphasizes that every step of evidence collection is guided by the patient’s consent and their account of what happened. Nothing proceeds without your agreement.