The Bad of 'The Wire'

Officer Anthony Colicchio (played by Benjamin Busch)
A thuggish and seemingly racist white cop (is there any other kind?). He views the corner boys as scum and is not adverse to pummeling them to a pulp.

Marlo Stanfield (played by Jamie Hector)
He is just evil. A hard hitting drug thug with no soul.

Felicia 'Snoop' Pearson (played by Felicia Pearson)
You don't wanna f*ck with her. She may be small but she is lethal and unquestioning. She will take her kill orders and not think twice about them.

Maurice 'Maury' Levy (played by Michael Kostroff)
The man is a lawyer to the criminal underworld. He is ferocious and unethical and as Omar said so brilliantly, 'a parasite'.

Calvin 'Cheese' Wagstaff (played by Method Man)
Dumb and thuggish. The man will sever family ties just to be where the money and the power are. Again a dumb thug.

Russell 'Stringer' Bell (played by Idris Elba)
Smart, sexy, and ambitious, he is also not above lying manipulating and destroying families in order to get ahead.

Avon Barksdale (played by Wood Harris).
Loves his family, but unlike Prop Joe, he is always ready to resort to violence to settle a dispute. Causing so many people great pain.

Scott Templeton (played by Tom McCarthy).
A reporter for the Baltimore Sun who just wants bigger and better things, even if that means questionable reporting for maximum impact.

Executive Editor James C. Whiting II (played by Sam Freed).
All the man cares about is winning a Pulitzer Prize, even if it means allowing a fabricated story to do so.

Managing Editor Thomas Klebanow (played by David Costabile)
Spineless and basically a whipping boy. He is also vain throws his weight about in a pathetic manner. He has no understanding of journalistic integrity.

Mayor Clarence V. Royce (played by Glynn Turman)
Like all politicians he promises promises promises and promises some more, yet rarely delivers. Manipulating the people using race is a low low blow.

Chief of Staff Michael Steintort (played by Neal Huff)
He advises the mayor as to who should get state funds for the highest margin of political gain. In other words pure evil.

Michael Lee (played by Tristan Wilds)
Michael is one of those bad characters that is really good, but always took the easy violent way out instead of thinking things out. Bad boy.