Bowling Green and informed Agent Wilt of Grayson Tackett's  request and Kirby's agreement to falsify the form 4473. Later that day, Agent Wilt served Kirby with a subpoena to testify  before a federal grand jury on March 8, 1993. A. Duane Schwarz, the Criminal Division Chief of the U.S. Attorney's  Office for the Western District of Kentucky, arranged to have the grand jury impaneled on March 8, 1993, solely to  investigate the accuracy of the form 4473.
In the meantime, Kirby had decided to cooperate with the ATF to verify his account of when and how the form had  been executed. Kirby agreed to make contact with Grayson Tackett, discuss the form 4473 with him, and record the  conversation with a hidden recordingdevice. Between March 4, 1993 and March 7, 1993, Kirby had five separate contacts  with either or both Linda and Grayson Tackett, each of which were recorded and later transcribed. During these  conversations, the Tacketts not only admitted to having asked Kirby to falsify the form 4473, they asked Kirby to perjure  himself before the grand jury and, if necessary, at Brian's trial.
On March 8, 1993 the federal grand jury met in Louisville, Kentucky and heard evidence regarding the circumstances  behind the execution of the form 4473. Kirby did not to appear or testify at the proceeding. The grand jury returned an indictment against Linda and Grayson Tackett the same day.
On April 2, 1993, Grayson Tackett testified at Brian Tackett's arson trial and described