Avenger

Dark night surrounds him,
The cloaked figure, the Avenger.

The wind howls,
masking his footfalls.

As he stalks an unknowing victim,
A wrong-doer, a thief, a liar.

Unsuspecting, he walks.
Dangerously, the Avenger follows.

A few more steps...
Aim...

The trigger is pulled,
The thief the liar falls dead.

The Avenger has done his duty.
♠ ♠ ♠
I think it's bs that Mibba doesn't let you label it a couplet!