Fort Worth police say the teen was arrested Thursday in the death of Sida Osman. The teen's name is being withheld because he's a juvenile.
His case is in the juvenile court system. It's unclear if prosecutors will seek to have him tried as an adult.
Police say the youngster's body was discovered Wednesday afternoon, a day after he was reported missing by his family.
Sida's body was found in the backyard of a vacant house about a block from the apartments where he lived.
Fort Worth police say the two had gone to the yard and the teen was irritated with Sida.
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