'48 Hours' producer Robert "Joe" Halderman has pleaded not guilty to charges of attempted grand larceny on Friday, after an alleged plot to blackmail David Letterman was foiled by authorities with an undercover sting operation, Reuters reports. Halderman, who faces a maximum sentence of 15 years in prison if convicted, attended the hearing with his hands shackled behind his back. The judge set bail at $200,000.

Letterman says he found a package of embarrassing e-mails and photos in his limousine. A note written by Halderman said he needed "to make a large chunk of money" by selling Letterman a screenplay treatment. "His actions reflect desperation that is alarming and dangerous," prosecutor Judy Salwen said during Friday's hearing.