A Mercer County teenager learns how long he'll spend in prison.
19-year old Lee Anderson was sentenced today to life without parole for 25 years.
He plead guilty last month to murder and robbery.
Anderson killed 72-year old Louise Pulliam in her home in Harrodsburg.
During today's sentencing, Anderson admits he made a "terrible mistake."
He was 17-years-old at the time of the murder.
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