However, in resting horses, a heart rate over 80 can be a sign of a serious problem. If a calm horse has a pulse that is consistently over 60, it can also be a problem. Things that can increase the horse's heart rate include exercise, fear, pain, stress, and excitement.
Because blood analysis is a comparison analysis (comparison of the victim's blood and the suspect's blood to blood found at the crime scene), reference blood samples are needed from the victim and suspect. A comparison must be made between the genetic markers in the victim s blood and the suspect's blood.
Biological evidence left behind at a crime scene could be matched to the person who committed the crime. Blood, semen, saliva, hair roots, or bone--any material containing nucleated cells--could provide a tissue sample. However, a method for obtaining the fingerprint needed to be found.