The online classified service helped authorities locate 39-year-old Rodney Liverman Sr. of Norwood and he was taken into custody at his home Friday, Kannapolis police said.
Liverman is charged with first-degree rape and three other sex offenses and remains in jail on a $250,000 bond, police said. His first court appearance is scheduled for Monday.
The U.S. Secret Service also helped track Liverman, but Kannapolis Police Capt. Chuck Adams said he would not provide details of how investigators linked Liverman to the case.
Adams didn't know if Liverman has an attorney and a phone listing for him could not be found.
The attack occurred May 31 at a home in Kannapolis, about 25 miles northeast of Charlotte. Police said a man entered a home with a knife and went into the woman's bedroom, demanded money and ordered her to take off her clothes before raping her.
The attack happened while the couple's two children were home, but police say they were not aware of the attack and were not injured.
The victim's husband was also in the room and backed away, watching the attack, investigators said.
At one point, the woman managed to grab the knife the suspect had put on the bed and threw it toward her husband, who did nothing to stop the attack, police said.
After the rape, the suspect told the woman to go into a bathroom, according to police documents. After the attacker left, the husband told his wife to take a shower and not call 911, the documents added.
Police say the wife called 911 June 7 and said a man with a knife raped her in the bedroom of their home. The husband allegedly watched the crime.
NC Attorney General Roy Cooper released the following statement Thursday regarding the case:
"This shocking crime is another example of why we're pushing websites that connect people to do a better job of protecting their customers," Cooper said. "The Internet has been a great benefit to all of us, but unfortunately criminals also use the Internet to commit their crimes and websites like MySpace, Facebook and Craigslist have a responsibility to make their sites safer."
The 25-year-old husband faces charges including first-degree rape, two counts of first-degree sexual offense and one count of attempted first-degree sexual offense. He is being held under $200,000 bond.
His identity is being withheld in order to protect the identity of his wife, who is the victim of a sexual offense.
Records show the husband pleaded guilty to indecent exposure for exposing himself last year to a pizza delivery woman in Virginia and received a 30-day suspended sentence.