updated 7/11/2005 1:38:37 PM ET 2005-07-11T17:38:37

Prosecutors on Monday reached a plea deal with the man accused of plotting to abduct David Letterman’s young son, allowing him to plead guilty to lesser charges and dropping a kidnapping-related charge in return.

Kelly Frank pleaded guilty in state District Court to felony theft, misdemeanor obstruction and possessing illegally killed wildlife, a felony. In exchange, Teton County Attorney Joe Coble dropped a felony charge of solicitation, which accused Frank of plotting to kidnap the talk show host’s son from Letterman’s ranch.

Frank, who had worked on the ranch near Choteau in northwestern Montana, was arrested in March after an acquaintance told authorities that Frank had talked of a plan to kidnap Letterman’s then 16-month-old son, Harry Joseph, and the boy’s nanny.

The acquaintance told authorities that Frank intended to hold the two for 48 hours on the belief he could extort $5 million ransom from Letterman. Frank previously pleaded guilty to stalking and intimidating a woman who alleges he also kidnapped and raped her.

Coble said he agreed to dismiss the solicitation charge because he believed the plea agreement accomplished what he wanted.

“Kelly Frank needed to go to prison. This gets that done,” he said after Monday’s court hearing.

10 years on theft charge
The agreement calls for a 10-year sentence on the theft charge, which accused Frank of overcharging Letterman for painting. It also calls for a six-month sentence on the obstruction charge and five years on the wildlife possession charge.

The obstruction charge accused Frank of lying to investigators who originally questioned him about the plot. The wildlife possession charged was filed only Friday and specifics about it were not immediately available.

District Judge Mark Buyske said he would decide whether to accept the plea agreement after reviewing a pre-sentence investigation. Sentencing was tentatively scheduled for Sept. 13.

Tom Keaney, spokesman for Letterman’s production company, had said Friday that he not heard about the pending plea agreement and said no one was available to comment.

Harry was born Nov. 3, 2003, to Letterman and his girlfriend, Regina Lasko, and named for the comedian’s late father.

For years, Letterman was targeted by a stalker, Margaret Ray, who called herself “Mrs. David Letterman” and broke into his Connecticut house at least seven times. She eventually pleaded guilty to breaking and entering. Diagnosed with schizophrenia, she served 10 months in prison and 14 months in a mental institution. In 1998, she committed suicide at age 46.

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