Article continues below advertisementFormer FBI agent Jennifer Coffindaffer expressed that the family of missing 84-year-old Nancy Guthrie - mother of Today show co-host Savannah Guthrie - should be "upset" and "irked" by the handling of DNA evidence.Jennifer criticized the decision to send a rootless hair sample found in the home to a private Florida lab instead of sending it directly to the FBI's specialized lab initially, citing an unnecessary delay of "70-some-odd days" in using advanced technology.