WATERVILLE, Maine -- A 56-year-old Norridgewock, Maine, man who was free on bail on a child sex charge is back in police custody after he allegedly tried to abduct an 8-year-old girl from a Wal-Mart in Waterville.

Police say Richard Decca was arrested Saturday after he led the girl out of the store to a car in the parking lot while her mother, brother and sister were shopping in the next aisle.

After hearing an alert from store security, shoppers Eric Caouette and Bruce Smith spotted a girl in the parking lot who fit the missing girl's description. She was with an older man.

Bruce Smith said, "I asked the guy what he was doing, or if it was his kid. He said, 'No,' and then I asked what he was doing. He said, 'Looking for her mother.' I said, 'I don't think so. Her mother is in the store looking for her.'"

Caouette and Smith then escorted the man and the girl back to the store., according to WMTW-TV in Portland, Maine.

Decca, 56, was being held on $100,000 bail on charges including criminal restraint, assault and attempted unlawful sexual contact.