EPHRATA, Wash. (AP) -- Grant County sheriff's detectives have determined that a 10-year-old boy was behind the wheel of a pickup truck that crashed into a canal south of Coulee City, killing his father and 8-year-old brother.
READ: Boy dies, driver missing in Grant County irrigation canal crash
The sheriff's office says Scott Kolves was teaching his 10-year-old son to drive when they were on a fishing trip March 30. The man grabbed the wheel when the boy had trouble but couldn't prevent the truck from leaving the canal road.
MORE:Fishermen describe emotional Grant Co. canal rescue
Nearby fishermen saved the 10-year-old and his 12-year-old brother. Eight-year-old Korey Kolves was found downstream and could not be revived. His funeral was Saturday.
WATCH: Brave fishermen help save children from deadly Grant Co. crash
Other news outlets report authorities are still looking for Scott Kolves' body.
The 45-year-old worked as a security guard at Ephrata High School and also worked with special needs children.