text: A retired Marine has pleaded not guilty to murdering his clothing-designer girlfriend, whose skeletal remains were discovered in a jungle in Panama two years after she disappeared. Brian Karl Brimager, 37, entered his plea on Friday after he was indicted by a federal grand jury in San Diego, in connection with the death of Yvonne Lee Baldelli. He has been in custody since June 2013 on charges including obstruction of justice and falsifying records related to the investigation. The 42-year-old woman from Laguna Niguel, California, was last seen in September 2011 when she arrived in Panama with Brimager. Her family reported her missing the following January. Brian Karl Brimager, 37, was indicted by a federal grand jury in San Diego, in connection with the death of Yvonne Lee Baldelli . The 42-year-old woman from Laguna Niguel, California, was last seen in September 2011 when she arrived in Panama with Brimager. Her family reported her missing the following January . The indictment alleges that Brimager murdered Baldelli, dismembered her body and disposed of her body parts in a remote jungle area. Brimager then engaged in an elaborate scheme to cover up the crime, including destroying evidence and sending a series of emails purportedly from Baldelli in order to make it appear to her friends and family that she was still alive, according to court papers. The indictment also alleges that Brimager attempted to conceal his crime by disposing of a bloody mattress involved in Badelli's murder in the ocean. Brimager conducted two Internet searches on Baldelli's computer, one for 'washing mattress' and a second for 'washing mattress blood stain,' according to documents. A man who was cutting bushes on the island province of Bocas del Toro found a bag containing Baldelli's remains in August 2013. Baldelli's family has the clothing designer was frequently out of touch so they did not immediately suspect anything was wrong. Panama police say Brimager left Panama for Costa Rica and the United States about 10 days after last being seen with Baldelli. In 2012 FBI agents and Panamanian forensic specialists found traces of blood on the walls and floor of the hostel El Sapo in the Bocas del Toro archipelago, which is the popular tourist spot where Baldelli was last seen. Brimager (right) has been in custody since June 2013 on charges including obstruction of justice and falsifying records related to the investigation . The indictment alleges that Brimager murdered Baldelli (pictured), dismembered her body and disposed of her body parts in a remote jungle area . Panama police say Brimager left Panama for Costa Rica and the United States about 10 days after last being seen with Baldelli . Sorry we are not currently accepting comments on this article.
target: Brian Karl Brimager, 37, was indicted by a grand jury in San Diego .
  Is accused of murdering clothing designer Yvonne Lee Baldelli in 2011 .
  Allegedly dismembered her body and disposed of it in a military backpack .
  Then engaged in an elaborate scheme to cover up the crime .
  Sent emails from her account to make people think she was still alive .
  He has been in custody since June 2013 on charges including obstruction of justice and falsifying records related to the investigation .