After deadly encounters where an officer discharges his/her firearm, often heard is: "Why didn't they use a taser?"
"Tell my family I love them" - These words transmitted to dispatch after a life and death gun battle.
Calmly talking on a phone, but refusing to show his hand concealed in his pocket - an encounter turned deadly.
The suspect knew what he had in his pocket would easily win against the taser held by the officer.
This suspect had the upper hand, he had the element of surprise.
On a daily basis, officers knowingly enter situations where the only known is the risk of the unknown.