When some gets a lethal injection, why do they swab their arm with alcohol?

[NFS4]

<< That way if the execution is cancelled, >>


I wonder how many times that has happened once the needle was hooked up?:Q

 

[Pretender]

<< I wonder how many times that has happened once the needle was hooked up? >>



The only example I can think of is in the movie True Crime. But that's fiction, so I guess that doesn't count