The original version of The Bad Seed, 1956.

http://www.brightlightsfilm.com/28/badseed.html
http://en.wikipedia.org/wiki/The_Bad_Seed

>>Funny you should mention that. I just received the new souped-up DVD edition of "The Maltese Falcon" in the mail a couple of weeks ago. Tried to talk my daughters into watching it this weekend but they weren't excited. I have gotten them to watch some "old" movies (anything before 1990 <g>), with occasional success, but it's always a sales job, especially if the movie is in black and white. It's about like asking them if they would like a rotary phone for Christmas.
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>>We have similar tastes in the oldies. All those you mention are favorites, with "Key Largo" maybe a bit less so. "Sunset Boulevard" and "Double Indemnity" are two others that come to mind. I like just about anything Bogart, also the noir movies. Give me something B & W set in San Francisco or L.A. in the rain and I'm good to go. World-weary detective who hasn't lost his sense of honor, a femme fatale, a convoluted plot -- yup!
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>The Third Man, Joseph Cotten and Orson Wells.