A Jan. 6 rioter has accused an indicted FBI agent of stealing his cash and silver bars, according to a new report. Former FBI agent Nicholas Anthony Williams was indicted last month on charges that he stole $2,500 in cash and silver bars, Law&Crime revealed Tuesday. An attorney for former Asians for Trump member Alexander Fan — was among those who entered the U.S. Capitol during the Jan. 6 attack in 2021 — told Law&Crime that Williams’ arrest was a direct result of Fan’s allegations of the theft on July 13. The indictment accuses Williams of having “embezzled and wrongfully converted to his ow…