Excoriations and contusions of the skin as artefacts in fictitious sexual offences.

Some women reporting a sexual offence to the police inflict injuries on themselves, usually with the help of pointed and/or cutting tools, in order to make fictitious assaults more credible. If there is a classical pattern of the findings, such fictitious assaults are easier to identify. However, it is more difficult to distinguish genuine from fictitious injuries, if blunt force is used. This paper reports on 4 such cases, and the characteristics of self-inflicted excoriations and skin contusions are discussed. In the cases described, the excoriations were produced by scratching with the person's own fingernails or by rubbing the skin against a rough surface; contusion bleeding was caused by pinching (lifting and compressing skin folds with the fingers). The pattern of the injuries showed striking parallels to classical patterns: multiple lesions in grouped, parallel and symmetrical arrangement and of evenly minor intensity; preference of body regions within easy reach; no damage of the clothing, or if any, damage inconsistent with the injuries as described.