Being a former police officer I would say that this is a very bad idea. There is too much risk for something to go wrong. Just a few would be the possibility of being infected with aids or hepatitus, also your just opening the police officer and the department to lawsuits. Not to mention the risk to the suspect or patient. You aren't able to get a medical history from a drunk and even if you did they are drunk so you couldn't take their word for it. It is just plain stupid and isn't worth the trouble it would cause.