Combined Taser & AED

The Taser is a device that fires two barbs into a person then rapidly oscillates Voltage between the barbs via the connected conductors. This Voltage causes involuntary contraction of skeletal muscles and therefore abolishes the presumably nefarious voluntary actions that were being carried out up to that point. The Taser is designed not to interfere with cardiac function for fairly obvious reasons.

An Automatic External Defibrillator (AED) IS designed to interfere with cardiac function, it mainly functions to synchronize chaotic electrical activity in the heart, which is a common and often lethal feature of heart attacks. AEDs are found in many public places, airports, convention centers etc. but lives could definitely be saved if they were more common. Fundamentally, the Taser & AED are quite similar, so what if we combined the two?

Imagine a Taser that functions as a normal Taser for most of the time, but "oh no! is that person having a heart attack? Officer!" The officer draws his Tazer, pulls a special one-time pin to enable AED mode. A rod pulls out from the Unit and is placed at the bottom of the breast bone for ideal targeting/spacing. "Pop!' the barb go in, either side of the heart. The AED software monitors the electrical activity and if appropriate, delivers a defibrillating shock.

The idea behind this is that you get hundreds of thousands of AEDs into the public space, in the hands of the police, they're already targeted to trouble spots and crowds where more heart attacks might be suspected. The idea behind the one-time pin means that the Taser can't be turned into a lethal weapon, then back again without significant trouble, it should have to go back to the factory. Maybe the pin also turns on a bright LED or some other indication to demonstrate what mode it is in.