Au pair testifies she flipped on Brendan Banfield because she felt guilty about the killings of his wife and another man

CNN, POOL, WJLA, FAIRFAX COUNTY POLICE DEPT. By Lauren del Valle, Dakin Andone, CNN (CNN) — The au pair who was having an extramarital affair with Brendan Banfield when he allegedly killed his wife and another man in February 2023 said she finally agreed to cooperate with prosecutors a year after her own arrest because