Article continues below advertisementAshleigh Banfield isn't backing down.The veteran journalist is standing firm on her earlier reporting that Savannah Guthrie's brother-in-law, Tommaso Cioni, remains the "prime suspect" in the case involving her mother, Nancy Guthrie, who has been missing for nearly two weeks.During the Thursday, February 12, episode of Dan Abrams' podcast, the topic came up again."Ashleigh, about a week and a half ago or so, you had reported that Nancy Guthrie's son-in-law, Annie [Guthrie]'s husband, was a possible suspect here. Any more information about that?" Dan asked.