Inmate Casey White (L) and corrections officer Vicki White – (SOURCE: BBC)

US police are searching for an escaped inmate who is facing murder charges, and a guard who may have helped him.

Inmate Casey White and corrections officer Vicki White were last seen on Friday morning at the Lauderdale County Sheriff’s Office in Alabama.

Ms White said she was taking him to a mental evaluation, but officials later realised it had not been scheduled.

Police now believe Ms White helped orchestrate the escape and have issued a warrant for her arrest.

Speaking at a news conference on Friday, Lauderdale County Sheriff Rick Singleton noted that Ms White had sold her house about a month ago and had “talked about going to the beach”.

Friday – the day the pair went missing – was supposed to be her final day at work.