The Morton mother accused of killing her autistic daughter took the stand in her own defense today.

Karen McCarron told jurors she blamed herself for her daughter Katie's disability.

This as prosecutors tried to show McCarron methodically killed the little girl in May 2006.

The prosecution had McCarron demonstrate with a plastic garbage bag how she suffocated her three-year-old autistic daughter.

Using his fist, prosecutor Kevin Johnson told McCarron to place the bag over it.

McCarron said Katie laid flat on the ground as she was losing air.

Johnson said, "Could you see her face?" "No" McCarron replied.
Johnson asked, "How long did you twist the bag?"

"Two minutes," McCarron replied.

"Why did you let go after two minutes?"

McCarron said, "she stopped struggling." Johnson: "Is that when she defecated? You knew that was a sign of death."

"Yes," McCarron said.

Prosecutors took McCarron back to May 10, when they say she attempted to smother Katie with a pillow, but took it off her face after a few seconds. When Johnson told McCarron she failed to carry it out then because she knew it was wrong McCarron agreed saying yes."

McCarron told defense attorney Marc Wolfe she blamed herself for her daughter's autism.

She said "it was unbearable. I felt I caused Katie's autism. I felt vaccinating her would not help her. It brought me a great deal of guilt."

McCarron is charged with two counts of first-degree murder, obstructing justice and concealment of a homicidal death.

Testimony continues Monday morning.