(CNN) -- In the middle of the Idaho wilderness, a man on horseback had a brief conversation with two campers. The rider's realization later that he may have been talking to California Amber Alert suspect James DiMaggio and his alleged teenage captive has now focused a nationwide manhunt for the pair on the rugged mountain area in central Idaho. 

The horseback rider saw the man and girl Wednesday and struck up a brief conversation with them, Andrea Dearden, spokeswoman for the Ada County Sheriff's Office, said Friday. 

He was not aware of the manhunt at the time, but he called the Amber Alert tip line after he saw a news account that night and realized the pair matched the description of DiMaggio and 16-year-old Hannah Anderson, she said. 

The rider's impression of the pair was "it seemed odd but nothing as alarming," Dearden said. 

"They did speak and exchange pleasantries. I don't think there was a lot of information exchanged," she said. "He left the conversation believing they were camping in the area." 

The rider said the man and girl were on foot, hiking with camping gear, Dearden said. 

Dearden appeared to be correcting authorities' earlier reports that the suspect and girl were spotted by more than one horseback rider. 

Investigators set up checkpoints where DiMaggio and Hannah were believed to be traveling in the River of No Return Wilderness area, about 15 miles outside Cascade, Dearden said. 

Authorities haven't yet evacuated any homes or businesses, she said, adding, "We have those access points secured."  QUESTIONS:

Q1:
1. What is the name of the teenager who has been abducted in California?
2. Who has been abducted by a California Amber Alert suspect?
3. What is the name of the captive teenager in California?
Q2:
1. How old is Hannah Anderson?
2. How old is the teenager who has been abducted in California?
3. What is the age of the kidnapped teenager in California?
Q3:
1. What is the name of Hannah Anderson's alleged captor?
2. What is the name of the California Amber Alert suspect?
3. Who has allegedly abducted a teenager from California?
Q4:
1. When did the captor and his teenage captive  from california have a conversation with a horseback rider?
2. When did Hannah Anderson and her alleged captor talk to the man on a horse?
3. When did James DiMaggio and his captive speak with a man riding a horse?
Q5:
1. Who is Andrea Dearden?
2. 
3. 
Q6:
1. Andrea Dearden is a spokeswoman for what county?
2. What county in California does Andrea Dearden work for?
3. Andrea Dearden represents what county in California?
Q7:
1. What tip line did the man riding a horse call after he met the alleged kidnapper and teenager?
2. The horseback rider called what tip line after his interaction with the two campers?
3. What tip line did the horseback rider call after he thought he had spoken with Hannah Anderson and her kidnapper?
Q8:
1. Did the horseback rider watch the news on the night he spoke with the two campers?
2. Did the man riding the horse watch the news after his conversation with Hannah Anderson and her kidnapper?
3. 
Q9:
1. Did the horseback rider think his conversation with Hannah Anderson and her kidnapper was odd?
2. Did the rider consider his interaction with Hannah Anderson and her kidnapper odd?
3. 
Q10:
1. After his conversation with Hannah Anderson and her kidnapper, was the horseback rider alarmed?
2. Was the horseback rider alarmed after his conversation with Hannah Anderson and her alleged kidnapper?
3. Was the horseback rider alarmed after his interaction with the two campers?
Q11:
1. Did the horseback rider and the two campers exchange a lot of information?
2. Did the man on the horse exchange a lot of information with Hannah Anderson and her kidnapper?
3. Was a lot of information exchanged between Hannah Anderson, her alleged kidnapper James DiMaggio, and the horseback rider?
Q12:
1. Were the man and girl that the horseback rider saw on bikes?
2. Were Hannah Anderson and her captor seen riding bikes by the horseback rider?
3. 
Q13:
1. What area were Hannah Anderson and her captor James DiMaggio believed to be traveling in?
2. Investigators think Hannah Anderson and her captor James DiMaggio were traveling in what area?
3. Hannah Anderson and her captor James DiMaggio were believed to be in what area?
Q14:
1. What is the nearest town to the area where Hannah Anderson and her captor James DiMaggio were traveling in?
2. Hannah Anderson and her captor James DiMaggio were near what town allegedly?
3. What is the town nearest to the area Hannah Anderson and her captor James DiMaggio were believed to be in?
Q15:
1. How far away is the nearest town to the area where Hannah Anderson and her captor James DiMaggio were?
2. Hannah Anderson and her captor James DiMaggio were how far from the nearest town?
3. 
Q16:
1. What state was the area where Hannah Anderson and her captor James DiMaggio were allegedly traveling in?
2. In what state were Hannah Anderson and her captor James DiMaggio seen?
3. 
Q17:
1. Did investigators set up checkpoints in the area where Hannah Anderson and her captor James DiMaggio were in?
2. Were access points set up in the area where James DiMaggio and his teenage captive were said to be traveling in?
3. Did investigators set up checkpoints to find Hannah Anderson and her captor James DiMaggio?
