allow breath sounds. the stethoscope in the hospital, we can use clear breath sounds. >> they could have used a stethoscope to hear whether or not it's breathing. >> stethoscope, vital signs, blood pressure, heart rate. you do feel a pulse at a steady rhythm or abnormal rhythm? what we call abnormal rhythm. >> the cause of death according to the medical examiner was compression of the neck and the chest. >> insofar as the chest is concerned, the way a person normally breathes is that the muscles of the diagram and intercostal muscles between the ribs help to elevate the chest and extend it that causes negative pressure to take in air in the lungs. if you compress the chest, it's called burking. you cannot breathe.