After 3-year-old Jeremy Scholl's body was found in Henry Hagg Lake Monday evening, authorities discovered four pairs of shoes along the shoreline.

The boy's family was nowhere around. Search teams combed through the water until after nightfall and scoured the nearby woods. They found no one but saw signs that others were there: Sneakers and flip-flops, in different sizes, unclaimed on the beach.

When searchers returned Tuesday morning, they were looking for three generations of a family. By afternoon, they found them all.

A dive team recovered the bodies of Jeremy's mother, grandmother and uncle about 30 to 40 feet from the shoreline, in water that ranged from 8 to 13 feet deep. Authorities identified his family members as Gabriela Garcia-Ixtacua, 25; Jova Ixtacua-Castano, 42, and Michael Garcia-Ixtacua, 13, respectively.

Jova Ixtacua-Castano was mother to Michael and Gabriela Garcia-Ixtacua and grandmother to Jeremy. They lived together in Hillsboro.

Their bodies were recovered at the bottom of the lake, about 25 yards away from the location where Jeremy was found hours earlier.

Investigators think the family members drowned Monday at the park, which lies a little more than six miles northwest of Gaston. They were there to picnic and swim.

Their official causes of death were not available Tuesday. No one had any visible injuries.

Authorities found no signs of foul play, said Sgt. Bob Ray, a Washington County Sheriff's Office spokesman. Ray could not remember another call like it, across the span of his 16-plus year career.

No one witnessed the apparent drowning, Ray said, even though other people were nearby along the shoreline. The lake's hilly perimeter likely blocked their view.

Authorities don't know all the details behind what happened and likely never will. But investigators speculate that at least one family member ran into trouble swimming and others went to help. Detectives are continuing to seek answers.

The last drowning at Hagg Lake occurred in 2008, when a 27-year-old Portland man was swimming and couldn't make it back to shore. Ray said the 2008 incident occurred in the same place as Monday's, and a rack offering free life jackets was installed at the location afterward. The family was not wearing flotation devices.

Authorities closed the lake Tuesday for their search, marking its entries with signs. Law enforcement officers and reporters filled the area, instead of people fishing and picnicking. On summer days, 10,000 people sometimes visit the park, Ray said.

The lake remained closed Tuesday out of respect for the family, the first time it has ever completely shut down during the summer, Ray said. It will reopen Wednesday at sunrise.

The search for the family started Monday, after two people fishing in the area spotted a small boy, unconscious near the shoreline where Sain Creek flows into the lake.

They pulled the boy from the water to a picnic area, where they performed CPR until Gaston fire crews arrived, Ray said. The boy died at the scene.

Deputies searched for the boy's family, but they couldn't find anyone. Unclaimed items littered the shore: A beach towel, a cellphone, a cooler with food and drinks, the four pairs of shoes. Gabriela Garcia-Ixtacua's identification was among the items. A Yorkshire terrier wandered with no owners around.

In the parking lot, deputies found a car, registered to Gabriela Garcia-Ixtacua. Inside, they found her mother's purse and identification, Ray said.

From the evidence gathered, deputies thought they could be looking for three additional people. Detectives later spoke with Gabriela Garcia-Ixtacua's sister who confirmed their fear and inclination: Her family had gone to the lake, and she hadn't heard from them since.

Authorities, including Marine patrol deputies and a Newberg Fire Department dive team, searched the water and nearby woods until about 10:30 p.m. Monday. By mid-morning Tuesday, they were back at it, this time with a Clackamas County Sheriff's Office dive team. They resumed their search where Jeremy was found.

Investigators camped out beneath a canopy of oaks and evergreens near a gazebo, just southwest of the lake's Boat Ramp C. Orange cones marked evidence along the beach. Gabriela Garcia-Ixtacua's sister picked up the car and terrier, Ray said.

After hitting the water, divers shouted back and forth to one another as they searched. They commented on the depth of trenches, just below them. Varying depths in the lake's floor make the body of water a patchwork of blue: The darker the water, the deeper the floor.

Before noon, a diver blew a whistle three times, indicating something was found in the water. Ray said divers had discovered the bodies of Gabriela and Michael Garcia-Ixtacua. They were found close together.

Other divers swarmed the spot and the first recovery began. They removed the brother and sister from the lake's floor.

Within 25 minutes, the divers recovered their mother, Jeremy's grandma, from the water. Her body was about 15 feet from her children.

-- Rebecca Woolington and Dillon Pilorget