Kelvin Walker to be sentenced today for Prince George's County murder

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UPPER MARLBORO, Md. (AP) - A Prince George's County man is scheduled to be sentenced for his role in a 2011 robbery and murder.

Kelvin Walker of Fort Washington faces life plus 20 years when he's sentenced Wednesday morning in Prince George's County Circuit Court.

The 24-year-old Walker was convicted in July of killing 17-year-old Justin Isaacs on the doorsteps of his home, then stealing a gold chain and money.

The gun had been stolen from the car of an off-duty police officer.

Prosecutors say Walker bragged to associates that he killed the teenager to prove that he was a killer.

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