Idea!

Would have posted this forever ago but I had forgotten a part of it.

Story:
Semi-Dystopian near-future, Northern Asian/Southern Russian city. People live quiet but anxious lives in a sort of quarantine. A virus/syndrome/parasite (undecided as of yet) called Sirius has crippled at least a portion of human society. It's cause is unknown, but it turns people's hair black and eventually causes severe headaches, mania, aggression a physical capabilities in affected humans. To counteract this, a top-authority "police" named "MOS" (Pronounced "moss," will backronym it later) has been formed. People refer to its members as "Mossmen." They have complete authority over the government and are allowed to kill whomever the want, whenever they want, in the interest of protecting the citizenry.

They monitor people (not extensively) and immediately execute any who show aggression or defiance towards them. People born with black hair are given ear-tags to show that they are not infected and are required to undergo monthly testing to ensure that have not contracted Sirius.

Executions are very common; every day specially equipped Mossmen come through the streets and incinerate whatever bodies lay in the gutters. The people live quiet lives in a mixed-culture city but always are afraid that something they do could cause them to be executed for the protection of society.
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I want super near future. It's very inspired by Half Life 2