Glenn Nelson, who was jailed for the murder of Nepalese woman Krishnamaya Mabo last June, has had his 'unduly lenient' jail sentence increased from 25 years to 30.
Top judges decided that his 25-year term did not properly reflect the sexual aspect of Mrs Mabo's brutal murder.
Nelson murdered Krishnamaya by strangling her to death, to silence her after he tried to rape the mum of three near her home in Arborfield last June.
He admitted murder and attempted rape and was jailed at Reading Crown Court in October.
Lady Justice Hallett said, "He killed her deliberately to prevent her testifying about the attempted rape. The acts that resulted in Mrs Mabo's death were accompanied by sexual activity, which must have increased her ordeal.
"The violence and sexual assault were inextricably interwoven."
A man's been jailed for life for murdering and attempting to rape a soldier's wife in a field in Berkshire. The body of 39-year-old Krishnamaya Mabo was found near the Robin Hood Copse in Arborfield in June.
Glenn Nelson - who's 30 and from the area - admitted strangling her at the High Court earlier. He'll serve a minimum of 25 years.
Thames Valley Police are continuing to question a 30-year-old man in connection with the murder of a woman whose body was found in Arborfield in Berkshire.
The body was discovered in a field off Robin Hood Copse between Castle Hill and Eversley Road at about 1pm on Monday 3rd June 2013.
Thames Valley Police said that although a formal identification process had not yet taken place, the dead woman was believed to be 39-year-old Krishnamaya Mabo, a Nepalese woman reported missing early on 3rd June 2013. The body was found during a major search involving a police helicopter and dogs.
Senior Investigating Officer Detective Chief Inspector Gill Wootton, of Thames Valley Police said:
“We are providing support to Krishnamaya’s family at this extremely distressing time and are keeping them fully informed on the progress of our investigation.
"A Home Office Forensic Pathologist attended the scene yesterday and a post-mortem examination is due to be carried out later today (4/6).
“We are now working to establish Krishnamaya’s movements on the evening of Sunday 2 June.
"I would like to appeal to anyone who was walking in fields or woodland between Castle Hill and Eversley Road on Sunday afternoon or evening, to come forward if they have not already spoken to us.”
Anyone with information can contact Thames Valley Police by telephoning 101, quoting URN 48 of 3/6/13.