An Arizona man who pleaded guilty to second-degree murder and child abuse in the killing of an 8-month-old baby has been sentenced to 20 years in prison.
Adrian Ponce was sentenced Friday and also got lifetime probation.
    
Authorities say Ponce burned and shook an 8-month-old girl who died of her injuries in 2013.
    
Ponce was not the baby's biological father but was engaged to her mother.
 
 
        