There are distinct differences between human and dog bite marks. Human bite marks are elliptical in shape, superficial in depth, and cause abrasions on the skin. You must obtain the patient's consent to collect evidence. Sexual assault evidence is not to be handed over to police, unless the patient also has gunshot or stab wounds or injuries serious enough to result in death, or is a minor. It usually cannot be collected without parental consent or a court order.
Older minors have the right to refuse to consent to the collection of such evidence.
In New York State sexual assault is not a mandatory report to police. Under the law, patients must be told about the local rape crisis services and that a rape crisis counselor can accompany them during the exam if they wish. Evidence must be kept in a locked and secured area for at least thirty days.