Police were granted more time to question a man who is being held in connection with the murder of a 22-year-old Sian O'Callaghan.
Magistrates sitting at Swindon had granted Wiltshire Police the extension until the early morning of Monday.
A 47-year-old man had been arrested on Thursday was named locally as taxi driver Christopher Halliwell.
O'Callaghan's body had been discovered in Oxfordshire after her suspected killer had guided the detectives to the spot.
On Friday police were given an extra 24 hours to question the suspect and a new extension was granted on Saturday morning.
The suspect still remains at the Gablecross Police Station in Swindon.
Searches for a second body were taking place in Gloucestershire.
Det Supt Steve Fulcher, stated that the officers had been searching near the town of Eastleach for the body of an adult.
O'Callaghan, aged 22, who was from Swindon, was not seen since leaving a nightclub in the Wiltshire town during the early hours of last Saturday.
Police had arrested the 47-year-old man at a Asda supermarket on Thursday.
Later that day O'Callaghan's body had been discovered about 15 miles away near Uffington in Oxfordshire after the suspect took officers to the site.
The man had also taken the officers to the area near the towm of Eastleach, Gloucestershire, where searches had continued.
Police were using mechanical diggers in order to excavate the corner of a field near the Oxfordshire-Gloucestershire border during their hunt for the second body.