Elements of a Rape
Although the specific elements of the crime of rape differ from one jurisdiction to another, it is generally required that the evidence gathered and subsequently submitted proves:
- That the accused had sexual intercourse with a female.
- That the act of intercourse was committed by force of the threat of physical force.
- That the act was committed without consent of the woman.
- That the act was committed at a time when the victim was unconscious, drugged, intoxicated or so mentally incapacitated or deficient that she could not agree to the act of sexual intercourse with offender or
- That the evidence indicates resistance by the victim thereby demonstrating that the intercourse occurred without her consent and against her will.
Although, the penis must be inserted into the vagina in order to classify the assault as rape, the male need not experience ejaculation. Therefore the act of penetration not completeness of the act differentiates rape from sexual assault.
This is of prime importance since, on occasion, a complainant will claim she was raped a result of a sexually motivated assault, but a physical exam reveals no penetration does not negate the fact that a crime occurred, only that the assailant will not face rape charges.
Interview & Crime Scene Procedures
The officer/investigator’s first duty at the scene of a rape or other sex crime is to render assistance or aid to the victim. For example, the officer should immediately obtain medical attention for the woman. If the attack has been a brutal one, and she is suffering from injuries, the officer should attempt to question the victim about the incident only if she is willing and able to speak.
The initial inquiry will basically consist of the old standbys: Who, What, When, Where, How, and Why. This initial interview should be made, if possible, while awaiting the ambulance or en-route to a health care facility.
If the identity of the suspect(s) is known, and he is not physically at the scene, the investigation officer should make arrangements for apprehension after attending to the victim’s, needs, and gathering as much information and material evidence as possible.
Usually the responding officer at a rape scene will face a victim under extreme emotional stress ranging from hysteria to severe depression. Shock is not uncommon. The officer must act as a reassuring comforter while trying to alleviate the victim’s fear and acquiring her trust. Experience strongly suggests that a female officer may best aid a rape victim. In the absence of a member of the same sex as the victim, a female relative or friend should be summoned as soon as possible.
During the first state of the rape investigation, the officers must secure the crime scene and conduct a search for physical traces of the attacker. While speaking with the victims, the investigator should determine if there is any physical evidence on her person that requires preservation. Frequently, a rape victim will pull the assailant’s hair or tear his clothing, or scratch his face thereby accumulating skin tissue or bloodstains under her fingernails. The victim’s clothes may also provide the investigators with important information. This valuable evidence must be collected, preserved and sent to the forensics laboratory with other crime scene evidence for analysis.
The clothing worn by the victim at the time of the sex crime may offer a wealth of evidence and should be secured as soon as possible without embarrassing the already emotionally fragile woman. The clothing will scientifically be examined for blood or seminal stains as well as hair and fibers that may lead to the identification of the rapist. The newly developed DNA identification process works best with seminal evidence because of the abundance of nucleic acid found in the male reproductive fluid.
Evidential material, including clothing, should be handled carefully to protect the integrity of the specimens and to safeguard the chain of possession. The investigator should follow these simple guidelines:
•Evidence should be properly packaged, labeled, and marked before being submitted to forensic lab.
•The number of people handling the evidence must be restricted.
•The investigator should make certain he or she initials each piece of physical evidence.
•Sworn statements should be checked and re-checked for accuracy.
Semen & Hair
Two of the most valuable pieces of physical evidence in a rape case are semen and hair. As mentioned earlier, DNA testing works well in rape cases because of the nucleic acid contained in semen, as well as hair. During sexual intercourse, the transfer of these materials from one body to another provides the investigator with invaluable evidence and investigating aids.
Seminal traces may be located by ultraviolet radiation. These traces are usually found on a victim’s undergarments or on bedding, towels, handkerchiefs, robes, cushions and the items likely to be present at a rape scene. Bloodstains may be found similarly.
Hair may also be part of the reciprocal transfer of tissue. Recovered hair is usually micro analyzed to determine sex, race, age and other characteristics of a suspect. Even a single strand is sufficient to ID a rapist. Microanalysis can also determine the area of the body from which it came such as from the scalp, chest, arm, or pubic portion of the anatomy.
Although, the investigators usually examine semen, blood and hair found on a victim, they may also be able to secure these items from a suspect who possesses the victim’s hair, blood or bodily fluids on his person or clothing.