Rudolph

ANDREWS, North Carolina (CNN) -- Searchers combing the North Carolina mountains for bombing suspect Eric Rudolph have discovered several small camp sites that they believe he may have used, authorities announced Wednesday.

Woody Enderson, head of an FBI-Bureau of Alcohol, Tobacco and Firearms task force investigating a series of bombings in the Southeast, said trash buried at one of the campsites had Rudolph's fingerprints on it.

Enderson told reporters at a news conference that investigators are receiving reports of Rudolph sightings "almost every day," as well as tips and information from area residents.

"Because of that assistance, we're making a lot of progress," Enderson said. "Day and night, we will continue to respond in appropriate ways to all reported sightings."

"We are still using every means available, including canine, aerial and electronic methods," he said.

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Trace the Search for Rudolph

Rudolph, 31, is the prime suspect in the January 29 bombing of a women's clinic in Birmingham, Alabama, where abortions are performed. Robert "Sande" Sanderson, an off-duty police officer working there as a security guard, was killed, and Emily Lyons, a clinic nurse, was severely injured.

On Wednesday, Felecia Sanderson, the widow of the slain policeman came to the North Carolina mountains to tape a segment of "America's Most Wanted." She said she decided to come after watching news reports in which some residents said they would help Rudolph.

"Some people called him a folk hero," she said. "He's a murderer. He's a terrorist," she said.

Rudolph is also wanted for questioning in three earlier bomb attacks in Atlanta -- at Centennial Olympic Park during the 1996 Olympic games; at a suburban women's clinic where abortions are performed; and at a nightclub with a mostly lesbian clientele. The park blast killed one woman and injured more than 110 people.

The intense search by more than 200 federal agents in rugged southwestern North Carolina was triggered July 7, when Rudolph contacted former neighbor George Nordmann, who lives on a lake near Andrews, to ask for food and other aid.

Nordmann later reported the contact to authorities and said Rudolph had stolen his blue 1977 Datsun pickup on July 9. It was recovered a short distance away on July 12.

Enderson said the truck didn't run well, and some witnesses who reported seeing it during the time it was in Rudolph's possession reported that it made an unusual amount of noise. For that reason, authorities are asking anyone who might have seen or heard the truck between 11 p.m. on July 9 and July 12 to contact them.

Enderson said Rudolph may have driven the truck out of the Andrews area, "as many as a few dozen miles," before returning to the area and abandoning the pickup near where it was stolen.