Superhero or a Villain?...

He left his drink, ice melting
whiskey on the rocks
Strode down the dim lit alley
out to the city blocks

Maybe it's a little nothing
just a phantom voice
but then a scream of horror
now, he had no choice

He turned the corner running
saw the victim on the ground
Three drunken men were circling
"Hey look at what we found"

"A dirty little whore, she is
Come and get some free"
He said; "No, and you ain't either
Who says? I guess that's me"

Three blades came out and swiped the air
He grinned and pulled his knife
Said; "You've made a big mistake
and it's gonna change your life"

They muttered threats of mayhem
tried to stab and slice
Killer danced and ducked them all
his eyes as cold as ice

He ignored the threats, and antics
their crude and stupid calls
He closed with them one by one
and he removed their balls!

Now they lay dead and dying,
on the dirty street
Wondering who was that hero?
As they lay at Killer's feet