PHOENIX -- Maricopa County prosecutors are seeking the death penalty against a man charged with fatally stabbing his 12-year-old half-brother.
Prosecutors said 27-year-old Andrew Ward should face the death penalty in the March 12 killing of Austin Tapia because Ward killed a child in an especially cruel manner.
Investigators said Ward explained his motive by saying, "Honestly, I just felt like killing."
Ward has pleaded not guilty to a murder charge in Tapia's death.
While in jail, Ward was booked on suspicion of first-degree murder in the April 2 death of his cellmate at the Lower Buckeye Jail.
Investigators said Ward used a golf pencil to stab 33-year-old Douglas Walker in the eyes, beat him and forced a plastic bag and peanut butter sandwich down Walker's throat.