page_title: Murder of Sian O'Callaghan
section_title: Timeline
hierarchical_section_title: Murder of Sian O'Callaghan / Timeline
caption_attribution_description: English: Savernake Forest near Grand Avenue This is the south-eastern extremity of the forest viewed from the southern end of Grand Avenue.
context_page_description: Sian Emma O'Callaghan was a 22-year-old British woman who disappeared from Swindon, Wiltshire, having last been seen at a nightclub in the town in the early hours of 19 March 2011. Her body was found on 24 March 2011 near Uffington in Oxfordshire. On 19 October 2012, at Bristol Crown Court, Christopher Halliwell, 48, pleaded guilty to O'Callaghan's murder.
context_section_description: At 02:52 UTC on 19 March 2011, O'Callaghan was captured on CCTV leaving Swindon's Suju nightclub to walk 800 metres (0.50 mi) to the flat in Swindon's old town that she shared with her boyfriend, Kevin Reape. Reape sent O'Callaghan an SMS at 03:24; analysis later showed that her mobile phone was in the Savernake Forest area, 12 miles (19 km) away, at the time the message was received. At 09:45, Reape contacted the police and reported O'Callaghan as missing.
  On 20 March, the police issued their first public appeal for information, and announced that they had begun searching Savernake Forest. They stated that the time that elapsed between O'Callaghan's appearance on the club's CCTV and her mobile phone signal (02:52 and 03:24 respectively) meant that the journey from Swindon to the forest could only have been made in a vehicle. On 22 March, approximately 400 members of the public joined the police in their search of the forest. The same day, an anonymous donor offered a £20,000 reward for information that would lead to finding O'Callaghan.
  On 23 March, police announced that analysis of O'Callaghan's mobile phone signals led to the identification of a number of "hot spots" to be investigated. Detective Superintendent Steve Fulcher of Wiltshire Police said that the investigation was moving at a "rapid pace", and that "significant lines of inquiry" were being developed. Members of the public were asked to stand down from searches.
  On 24 March, police made an urgent appeal for witnesses of a green Toyota Avensis with taxi markings, which had been seen between Swindon and Savernake Forest shortly after O'Callaghan's disappearance.
caption: Savernake Forest was searched extensively by police and members of the public
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