Riccio told AP that he raised the subject while talking with the FBI about an unrelated subject: a video of Anna Nicole Smith. But he said agents dismissed his report, telling him "they didn't want to be involved in another weirsd celebrity case."
"The guy flat-out told me he had items stolen from O.J.'s house," Riccio told the AP. "I have a legitimate business."
FBI spokeswoman Laura Eimiller said Riccio did not indicate a crime would be committed.
Riccio was advised to contact a lawyer before taking any action and was told that alerting the FBI would not absolve him of any potential crime, agent Linda Kline wrote of the meeting, which occurred in Los Angeles.
He was not clear how the operation would unfold. There was no mention in the report of any plans to use guns.
"I went along with O.J.'s plan," Riccio said. "It was a self-organized sting operation. Except for the final result, with him bringing people who had guns. I knew nothing about that."
Simpson, 60, and five other men were arrested after they allegedly stormed a Las Vegas hotel room with guns drawn Sept. 13 to seize items that were believed to include family photos and the suit Simpson wore the day he was acquitted of murdering his ex-wife and her friend.
Las Vegas police said the FBI did not alert them before the confrontation between Simpson and collectors Alfred Beardsley and Bruce Fromong.
"They contacted us afterward and provided us with the documentation," said Las Vegas Police Detective Andy Caldwell, the investigator handling the case.
Caldwell said he had no information about any FBI investigation into the incident.
Riccio, who had previously sold Anna Nicole Smith's diary, said he spoke for an hour with FBI agents about a video he obtained from a doctor who recorded Smith's 1994 breast implant surgery. A Texas doctor claimed in June he gave Riccio permission to use the video after Smith died. A judge has barred release of those videos in an unrelated case.
After discussing Smith, FBI agents gave Riccio about 15 minutes to discuss Simpson, but they expressed little interfest, he said.
Riccio said he contacted the Los Angeles Police Department, where he said he was switched from department to department before finally being told to file a civil complaint.
"No one seemed to be concerned about it," Riccio said.
