A conscienceless villain.    From Wordnet, Princeton University. 

"You talk as if he were perfectly conscienceless.".    From Wordnik.com.  [The Splendid Folly] Reference

Stuff is sold by the conscienceless, claiming to cure.    From Wordnik.com.  [Intestinal Ills Chronic Constipation, Indigestion, Autogenetic Poisons, Diarrhea, Piles, Etc. Also Auto-Infection, Auto-Intoxication, Anemia, Emaciation, Etc. Due to Proctitis and Colitis] Reference

Richard III type, absolutely heartless and conscienceless.    From Wordnik.com.  [Balzac] Reference

Moreover, these women are absolutely conscienceless themselves.    From Wordnik.com.  [The Secrets of the German War Office] Reference

He is a familiar type, a power-mad, greedy, conscienceless brute.    From Wordnik.com.  [The Last Word on Evil] Reference

"Fearful act of aggression by conscienceless Karamzili, no doubt!".    From Wordnik.com.  [Death Stalks The Ruins]

OpEdNews - Quicklink: Pundits on Plame: Clueless and conscienceless.    From Wordnik.com.  [OpEdNews - Quicklink: Pundits on Plame: Clueless and conscienceless] Reference

She was a nobody, an impudent, opportunistic, conscienceless nobody.    From Wordnik.com.  [Ungrateful Governess]

By the careless, conscienceless nurse, or thoughtless mother, it is regarded as.    From Wordnik.com.  [The Eugenic Marriage, Vol 2 (of 4) A Personal Guide to the New Science of Better Living and Better Babies] Reference

He's cocksure and conscienceless, and he has no respect for Roman institutions.    From Wordnik.com.  [Fortune's Favorites]

Swallowed by the ruthless, conscienceless, and bureaucratic Amalgamated Mining.    From Wordnik.com.  [Acorna's Search]

Obviously he considered me a conscienceless heathen, if not downright depraved.    From Wordnik.com.  [Sick Cycle Carousel] Reference

W's pattern of conscienceless extermination of others has continued until today!.    From Wordnik.com.  [Prior to 2000 W proved he was a stone-cold killer.] Reference

Her death was conscienceless and pitiless, and, undoubtedly, unnecessarily torturous.    From Wordnik.com.  [CNN Transcript Mar 15, 2006] Reference

If it does no good with conscienceless flacks like Chris Matthews, it can't do any harm.    From Wordnik.com.  [Elizabeth Edwards Spells Out For Wolf What's Wrong With Ann Coulter] Reference

But I resent the conscienceless reaction of the media in the matter which is still sub judice.    From Wordnik.com.  [ANC Daily News Briefing] Reference

And that complaining about the conscienceless existence of the rich amounts to "class warfare.".    From Wordnik.com.  [Marshall Fine: Shame on Bravo] Reference

Nearly an hour had passed when Alberdina awoke from her healthy, conscienceless slumber with a start.    From Wordnik.com.  [The Motor Maids at Sunrise Camp] Reference

But three lies says you're dealing with a liar, and deceit is the linchpin of conscienceless behavior.    From Wordnik.com.  [An Interview with Martha Stout] Reference

But we accept compulsory taxes because we recognize that voluntary taxes would favor the conscienceless.    From Wordnik.com.  [Tragedy of the Commons (historical)] Reference

Your background was the same as Gerard's and you didn't turn out to be a cold-blooded conscienceless devil.    From Wordnik.com.  [Fugitive Bride]

A two-edged saw is an abomination devised by conscienceless manufacturers for the seduction of innocent amateurs.    From Wordnik.com.  [Northern Nut Growers Association Report of the Proceedings at the Fifteenth Annual Meeting New York City, September 3, 4 and 5, 1924] Reference

And King and Lamb and all of their cohorts had turned her into a conscienceless automaton, willing to do whatever they told her.    From Wordnik.com.  [The Store]

He'd wanted to sweep the artist's clutter from that battered table and have her there. like the conscienceless barbarian he was.    From Wordnik.com.  [Captives Of The Night]

Even to-night he had looked into the hearts of women of her own former class; and he shuddered at their conscienceless inconsistency.    From Wordnik.com.  [The Genius] Reference

Do you have any regrets about using the term "super-predator" to describe the type of conscienceless, violent youth you have talked about?.    From Wordnik.com.  [Questions And Answers: John Diiulio] Reference

These are the same reckless, conscienceless, heartless people that tried to paint John Kerry as a "flip-flopper" when he changed his mind!.    From Wordnik.com.  [Rigid Republicans Flip On Minimum Wage Issue!] Reference

Giulio succeeded in winning over to his cause certain disaffected nobles and conscienceless men who were in the service of the duke; among them.    From Wordnik.com.  [Lucretia Borgia According to Original Documents and Correspondence of Her Day] Reference