James Lee DiMaggio/via Flickr Creative Commons

Law enforcement from local, state, and federal agencies zeroed in on the Frank Church-River of No Return Wilderness Area after a vehicle matching DiMaggio's was found abandoned on Friday about 40 miles east of Cascade, Idaho.  The abandoned car had been covered with brush with its license plates had been removed and was parked where a dirt road ends and a trailhead into the wildreness area begins.

A group of horseback riders in the area also reported seeing two people matching the description of Hannah and DiMaggio on Wednesday morning.

DiMaggio is suspected in the kidnapping of Hannah and the death of her mother, Christina Anderson, and 8-year-old brother, Ethan on August 4.  Both bodies were found in DiMaggio's home which had been set on fire.

According to the San Diego County Sheriff's Department, DiMaggio was a family friend and was in a "close platonic relationship" with Christina Anderson.  Officials said DiMaggio might have had an "unusual infatuation with Hannah and had made "uncomfortable" and "inappropriate" remarks to her about dating.

An Amber Alert had been in effect for Hannah and Ethan until Friday evening, when Ethan's body was confirmed to have been in DiMaggio's home. The Amber Alert remains in effect across California, Oregon, Washington, and Idaho for Hannah Anderson, according to the Los Angeles Times.

The Frank Church-River of No Return Wilderness Area covers over two million acres, according to the Christian Science Monitor.  It features more than 200 miles of trails and is known as one of "the roughest, most spectacular wilderness areas in North America."

Officials are concerned that Hannah and DiMaggio are not suited or prepared for camping in the rugged terrain known for unpredictable weather and predators like wolves and bears.

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