It's very possible that a 65 year old who resists arrest could be "tased" for the safety of everyone involved. If that happens it would be a very emotionaly charged event that would induce a high level of stress
Litterally hundreds of studies have been done on this topic and although the risk exists it's noty likely that it will be from the neuro-electrical shock
, but the stress induced by the confrontation.
Also, you'll need to evealuate the overall health of the 65 year old. He could be in better shape than thousands of people half his age who have surviced this event.