Mr. Chameleon - The Broken Promise Murder Case

In a small, but well furnished apartment in New York's Greenwich Village, an attractive woman in her early 30's, named Cybil Kent, is having cocktails with a handsome, young man named Roger Dalton. Roger eagerly says "This is the moment I've been waiting for Cybil. I've got terrific news for you!" Cybil says "News, Roger?" He says "I've finally landed it, Cybil, that job as a Commercial Artist with the advertising agency!" Cybil says "Roger, oh darling!" He says "That agency is one of the most important advertising firms in town! I'm to start work at the beginning of the week. And it's all thanks to you, Cybil". She says "Roger, that's wonderful because it means that now, at last, we can go ahead with our plans". Roger says "What? What do you mean, Cybil?" She says "Oh Roger, darling, do I have to say it? Our understanding was that as soon as you graduated from art school, and got a job, we'd be married". Roger says "Great Scott, you mean you took that seriously?"  Cybil says "What? Roger you know that was our agreement". He says "But, Cybil, I never dreamt you were really serious. I always thought it was, a kind of joke between us". She says "A joke? Roger you...." He says "The fact is, I've made plans of my own. I'm going to marry Vera Langdon. That's something else I meant to tell you this evening". Cybil says "You're going to marry Vera Langdon? After all I've done for you? All the sacrifices I've made for you?" Roger says "Cybil, you've been a wonderful friend and I mean to pay you back someday". Cybil says "Pay me back? Roger Dalton, you're not throwing me over for that society girl, Vera Langdon. Not when I've done everything for you. I've spent every penny I have to put you through art school!" Roger says "Cybil, listen to me...." She says "No! You listen to me! If you leave me, I'll go to the agency where you got this job and fix things so that you'll be through for good with every agency in town!  What's more, I'll go to Vera Langdon, and that wealthy father of hers, and show you up for the selfish, ruthless...." Roger says "You're not serious, are you?" Cybil says "I'll go even further, Roger, I'll kill you before I give you up to someone else! Do you hear me, Roger?"