Authorities say Yarbrough and Valencia were outside of a home when an argument started. Valencia is accused of shooting Yarbrough several times, hitting him in the chest and abdomen.
Yarbrough was taken to Hermann Memorial Hospital by Life Flight in critical condition. He was pronounced dead early Saturday morning.
Valenica is described as a black male, 5'6" tall, 150 pounds, with black hair and brown eyes. Deputies say he was armed with a silver or chrome 38 caliber revolver.
An investigation is ongoing. Deputies are trying to determine an exact motive. They have an arrest warrant for Valenica. Please call Fort Bend County Crime Stoppers at 281-342-TIPS if you have any information.