DS Sanders was a police officer who questioned Lachlan White over the death of Gerry Roberts in May 2018. DS Sanders caught Lachlan out when Lachlan lied and said he hadn't seen Gerry, and DS Sanders showed him that she has a record of him telling Gerry to go to The Grange B&B that day where the accident happened. Lachlan then quickly changes his story, saying that he forgot about the message and left because Doug told him to, and he didn't think Gerry was coming.
DS Sanders later investigates the fire at the Home Farm Estate glamping site in August 2018, alongside DI Cox. The officers are suspicious when they find blood and Priya Kotecha tells them that she saw writing scratched into the wall, believing it had said "LACHLAN IS A KILLER".