MORRIS, Minn. - A teenager pleaded guilty Wednesday to the December 2010 murder of his mother, 50-year-old Tamara Lee Mason.
Jacob Seth Cobb, 18 of Alberta, Minn., pleaded guilty to the second count of his indictment, murder in the second degree while committing assault in the third degree, as part of a plea agreement with prosecutors.
At the plea hearing, Cobb said that on the night of the murder he and his brothers, Dylan Clemens and Andrew Cobb, got upset with their mother.
The three "decided that I would attack (Mason)," Jacob said. He then "grabbed her around the throat" and choked her. When Mason passed out, the three brothers checked if she had a pulse. They determined she did, then Dylan put a bag and belt around her, Jacob said.
Jacob told Judge Gerald Seibel that when he stopped choking Mason he did not think she was dead, but that his assault played a role in her death.
A sentencing date has tentatively been set for Sept. 17 for all three brothers. Clemens and Andrew Cobb have pleaded guilty to charges of being an accessory after the fact to murder.