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FORT WORTH One day after Thomas Harper was found guilty of killing a Good Samaritan at an Arlington intersection in 2011, a Tarrant County jury sentenced him to life in prison for the crime.

The verdict follows a day of testimony in the punishment phase of Harper's trial for the shooting death of 18-year-old Clarence Robinson. Robinson had been trying to help two children in the defendant's sport utility vehicle moments after a crash caused by Harper that killed another motorist, Najee Nazir.

Robinson's father addressed Harper shortly after the punishment was handed down.

'When it first happened, I wanted to string you up by your neck,' Clarence Robinson Sr. said. 'But I have to be in my son's place and let you know that I have to forgive you first, because God says I have to forgive you.'

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