Trial begins for Castle Rock mom accused of killing her children

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

DOUGLAS COUNTY, Colo. -- The trial for the Castle Rock mother accused of smothering and killing her two children began with each side presenting their opening statements Monday.

Kelli Murphy, 41, faces two counts of first degree murder for the deaths of 9-year-old Liam Murphy and his six-year-old sister, Madigan. The presiding Douglas County judge has blocked off approximately two weeks for the trail.

The district attorney has not yet confirmed whether Murphy will take the stand to testify.

Murphy's children were found dead in their bedrooms on May 23, 2011 after investigators say Kelli Murphy called 911 to say she had tried to kill herself and that her kids were "in heaven.”

Prosecutors say Murphy was distraught over an impending divorce. Murphy's defense attorney Ara Ohanion said her client was planning to commit suicide.

But, Ohanion said, Murphy blacked out after mixing a full bottle of vodka and sleeping pills, causing that plan to go horribly awry.

"She wanted go to sleep and not wake up," Ohanion said. "She was planning on her kids finding her (dead), and hoping they would think she did not abandon them. She just passed away.

"Instead, when she woke up, the kids were dead and she wasn't."