It has been used in circumstances like that, and some of the medical research is actually suggesting using the taser or any device to end that confrontation as quickly as you can, rather than allowing the person to continue down the path of physically exerting themselves literally to death. We have seen medical researchers recommend that the taser can stop that action and get that person into custody, and then, as Mr. Palmer recommended, get them to a medical facility or to medical personnel to assist them.
On January 30th, 2008. See this statement in context.