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.
The Value of DNA Evidence. DNA is a powerful investigative tool because, with the. exception of identical twins, no two people have the same. DNA. Therefore, DNA evidence collected from a crime. scene can be linked to a suspect or can eliminate a. suspect from suspicion. During a sexual assault, for. example, biological evidence such as hair, skin cells, semen, or blood can be left on the victimâs body or other. parts of the crime scene.