The suspect has been on the run since 19 July.
Mother of two Jelinda Arukesa was found dead in a secluded area at Deproma, Santo.
Local media report the suspect was last seen with Arakusa at Banban before the alleged murder.
The suspect Sahe Molu is from the island of Paama and lives in Luganville.
Vanuatu Police have warned the public that it is an offence to harbour or help anyone who has committed a crime.
