YAKIMA, Wash. — A Yakima gang member who was 16 when he shot another teenage boy and his sister was sentenced Friday to 16 years in prison.

Alejandro Gonzalez, now 17, was prosecuted as an adult in Yakima County Superior Court, where he pleaded guilty to one count of first-degree assault and another count of second-degree assault.

The charges stemmed from a shooting in the 800 block of La Follette Street on Sept. 12, 2011. La Follette is located near State Fair Park, a block south of Fair Avenue and Nob Hill Boulevard.

Gonzalez was accused of opening fire with a .22-caliber pistol on a 14-year-old gang rival and his 17-year-old sister, wounding the boy in the back and the girl in the leg.

Detectives were able to quickly crack the case because the victims cooperated with police, telling investigators they were attacked by an acquaintance they knew as Alejandro “Smokey” Gonzalez.

A Yakima Police Department spokesman at the time described the level of cooperation by the victims as unusual, stemming in part for the male victim’s concern for his sister’s safety. A .22 revolver was found in Gonzalez’s home.

According to court records, Gonzalez had prior convictions as a juvenile for unlawful possession of a firearm and third-degree assault.

As part of his sentence, he was placed on three years of post-prison probation.

The court also found him to be a member of a street gang, which carries probationary restrictions on associations with other gang members and gang tattoos or piercings following his release from prison.

• Chris Bristol can be reached at 509-577-7748 or cbristol@yakimaherald.com. Follow him on Twitter at twitter.com/ChrisJBristol.