On October 16, 2018 it was announced by HLN that Costello was to be laid off, along with Michaela Pereira and Ashleigh Banfield, as part of the network's decision to scale back their live news programming. The final broadcasts for their programs took place on Friday, October 26, 2018. Although both Ashleigh Banfield and Michaela Pereira stayed to host their shows until their last days, Costello did not appear on air after October 16, 2018 with CNN correspondent Dianne Gallagher hosting the final broadcast.