Former Georgia Lt. Gov. Geoff Duncan received subpoenas to testify before a Fulton County grand jury this month . Duncan has been a sharp critic of Donald Trumps efforts to upend Georgias election results . Duncan said that he would be willing to testify in as many settings as I possibly can in response to a question about whether he would testify in any other related trials . Duncan is the third witness publicly known to receive a subpoena for grand jury testimony . Independent journalist George Chidi and former Georgia Democratic state Sen. Jen Jordan have also been subpoenaed . The subpoenas are the clearest indication Fulton County District Attorney Fani Willis intends to seek indictments in her longrunning criminal probe into efforts by Trump and his allies to overturn the presidential election in Georgia . Duncan on Monday would not comment on the timing of his expected appearance in front of the grand jury . He said he would not reveal whether he will testify in other related cases . He has not yet been notified of an appearance date for those subpoenaed or whether he has been notified by the district attorneys office has yet to announce a date for the appearance date has not been announced . The district attorney has said she will make her charging announcements before September . The subpoena is expected to be made . The grand jury will be in place before September, according to a spokesperson for the Fulton County district attorney Fani Willi. Willi has declined to comment. The district office declined to provide an immediate comment. He has said he has not commented on the date of any further information. He said that it is unclear if he has any additional information about the subpoenas or if it has any further details about the grand juries or if he will have any further evidence of any evidence of evidence of wrongdoing