Confused about Tasers

[Tropicana]

I thought they were a non-lethal alternative to guns. Are they like phasers on Star Trek? Can they be set to sun and set to kill? Why are people dying from taser shots?

[Emperah]

whats de confusion dem sending voltage into the body. guh look pan uchube and u will see de barbs dat get into de body fi dem send voltage into ppl.
They are very lethal