EL DORADO COUNTY (CBS13) — Authorities say they believe they have found the body of a 16-year-old boy who drowned in the North Fork of the Cosumnes River.

The El Dorado County Sheriff’s Office says Brian Trevisan-Maxey and a group of friends were out walking along the rocks near the river on Friday. At some point, the group noticed that Brian (who was trailing behind) was no longer there.

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A search came up empty, so the group called 911. El Dorado County Search and Rescue and a dive team immediately started searching the area and the water, but also came up empty.

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On Tuesday, as the search continued, a body was discovered in the water.

Due to the area have extremely fast-moving water and a depth of about 25 feet, recovery attempts have so far not been successful.

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The sheriff’s office says while positive identification hasn’t been completed, they believe the body is Brian’s.