According to a description on the police department's cold case website, Jeppson and his family returned from church to their house at 1951 Browning Ave. on Sunday, Oct. 11, 1964. Jeppson left the house shortly after to feed his two German shorthaired pointers, but neither Jeppson nor the dogs were ever seen again.
He is described as 5-foot-6 inches, 140 pounds, with blond hair and blue eyes. He also had dental braces.
Salt Lake City police Detective Josh Ashdown said police received new information that led them to conduct Saturday's search, but he declined to give specifics about the tip.
Searchers focused on a particular area of the gully, which is near Clayton Middle School, after cadaver dogs showed some interest in that area.
After digging 8 feet down, the dogs stopped indicating there was anything to dig for, Ashdown said. At that point, police said they were giving up on searching the area.
Suzanne Tate, who is Reed Jeppson's older sister, told news reporters she remains hopeful and wonders what her little brother went through.
"We'll keep searching until we find him. You don't find someone if you stop looking," Tate said, on the verge of tears.
Someone knows what happened to her brother, Tate said, and she implored whoever that is to "just tell us."
Corey Thurgood lives in the neighborhood and went to junior high school with one of Jeppson's relatives, and he remembers the case. Thurgood was standing outside the police tape Saturday morning, recalling how children have played in and around the gully for decades. "This isn't some remote spot," Thurgood said.
Ashdown said the police do not intend to return. Still, they are always hoping someone in the neighborhood might remember a detail and call.
"Our department never gives up on a case," Ashdown added.
The police reopened Jeppson's case two years ago on National Missing Children's Day. The teen is one of their three oldest unsolved missing-child cases.