Boise & Garden City

Authorities work to determine how Meridian man ended up dead on Boise River sandbar


The decomposed remains of Andrew Joseph Lee Gatten, 34, have been positively identified, but the cause and manner of his death have yet to be determined, the Ada County Coroner’s Office announced Wednesday morning.

Gatten’s death is under investigation by the Ada County Sheriff’s Office. There were no obvious signs of fatal injury, and no one had reported the Meridian man missing, the Sheriff’s Office reported.

He appeared to have no permanent address, according to a sheriff’s post.

Officials found the body Monday evening after a caller reported possibly seeing human remains on the small piece of land in the river west of Willow Lane around 7 p.m.

It is unclear how long the body had been in the water, officials reported, and detectives are sure Gatten was still alive as of May 4. Now investigators are working to determine when Gatten was last seen, the Sheriff’s Office reported.

The Boise River had been over flood stage until recently and dropped back down to normal seasonal levels only last week.

On Tuesday morning, the coroner removed the remains — said to be “in an advanced state of decomposition” — from the sandbar. An autopsy has been conducted, and a forensic team is working on the case, the coroner’s office reports.

It was the second body found in the Boise River since this weekend, when the remains of Mark Rose, reported missing in April, were found in a debris pile near a Canyon County sportsman’s access.

Anyone with information about Gatten’s disappearance or death is asked to call Ada County nonemergency dispatch at 377-6790 or email