* Content Warning: sexual assault/rape mentions below
“I have recently been sexually assaulted or raped”
If you have been sexually assaulted or raped, it is important to remember that it was not your fault. Sexual Assault Referral Centres (SARCs) provide specialist support including access to emergency contraception, testing and treatment of Sexually Transmitted Infections (STIs), and a forensic examination to collect any evidence. Forensic evidence can be collected and stored even if you haven’t decided whether to report the crime.
The timeframe for collecting forensic evidence varies by sample type. Oral swabs can be taken up to two days after an assault, vaginal swabs up to seven days, and anal swabs up to three days. DNA from skin contact can be detected up to two days afterwards. Fibres, such as from clothing, can last up to seven days, and semen can be detected on clothing even after being washed.
Forensic evidence packs will generally be stored for seven years if someone does not report it to the police, but this varies between SARCs.
Ideally, a forensic examination should take place as soon as possible after an assault. It is often instinctive for someone to wash themselves after an assault which can wash away DNA evidence. If the person has not washed, it may be possible to gather DNA evidence up to seven days after. Someone who decides to report an assault should abstain from sexual activity and refrain from changing their clothes and washing, drying, or brushing their hair. Any toilet paper used should be saved in a sealed plastic bag.