An Arizona man convicted in the beating death of a 93-year-old woman was sentenced Thursday in a case that went unsolved for nearly 30 years.
Authorities say the case was solved after investigators revisited DNA evidence from the crime scene.
Gary Billy Bivens pleaded no contest to second-degree murder and aggravated assault in the January 1981 death of Martha Winters during a burglary at her home in Phoenix.
Her 92-year-old sister-in-law who lived at the home also was beaten in the attack, but survived.
Authorities say investigators matched DNA found on a comb outside the Winters home with DNA from Bivens.
The no-contest plea by the 55-year-old in December spared him the possibility of the death penalty.
Thursday afternoon, Bivens' sentence came down. He will spend 55 years in prison on both counts.
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