What if the Taser failed to incapacitate him?
Follow Sir Robert Peele's approach... billy clubs... or aerosol based OC and drive stun... however could that one go wrong?!
Frank, Nothing will 100% all the time... once saw a guy take a 20gauge blast from 25 feet of 00 buck and only have a handful of pellets pulled from his neck/ upper chest (he survived... QOL ... whole nother story ).