Why do they sterilize the needles for lethal injections?

Answer 1

Procedures, and doing everything by the standards of medical doctors, even though it is to terminate,,

why don't they just shoot the bad guys iin the back of the head, and get it over with quickly, it is almost like a ceremony,,
what ever made you think of that question, ?

now you have me wondering, if they sterilize the instruments when they do autopsies??
OR use pain killers (JUST KIDDING)

Answer 2

because the needles might not be clean and they might transfer bacteria to the wound in the skin-(tetano)