Tess Damm stands in court during a 2007 criminal hearing related to the stabbing death of her mother, Linda Damm.
Tess Damm stands in court during a 2007 criminal hearing related to the stabbing death of her mother, Linda Damm. ( Sammy Dallal )
DENVER — The Colorado Court of Appeals has upheld a sentence for a Lafayette girl who plotted in 2007 to kill her mother with her boyfriend, who wielded the knife that took Linda Damm’s life.  
   
Tess Damm, 15, pleaded guilty in 2008 as a juvenile to second-degree murder and as an adult to solicitation to commit second-degree murder for conspiring to kill her mother. She was sentenced to five years in the state's Division of Youth Corrections, where she'll stay until she turns 21. She then is sentenced to serve another 18 years in an adult prison. She'll be eligible for parole after serving 75 percent of her sentence.
   
Bryan Grove, 17, of Lafayette, pleaded guilty in 2008 to an adult second-degree murder charge for killing Tess Damm’s mother in her Lafayette home in February 2007. Police say Grove and his girlfriend plotted to kill her mother because of her abuse.  
   
The body of Linda Damm, who Grove stabbed 18 times in the neck, was found in the back of her Subaru in the garage of her home. The body had been there for weeks. Grove was sentenced to 40 years in prison. He becomes eligible for parole in 2036. His mandatory release date is 2046.
   
Tess Damm spent a little more than a year in pre-sentence confinement that was credited toward the prison sentence. She argued that the pre-sentence confinement also should count against her juvenile sentence, or that some of the time she spent in the juvenile system should count against the prison term. A court ruling Thursday upheld her original sentence.