MARGATE, UNITED KINGDOM - NOVEMBER 17: A lady lays flowers outside the house where the body, believed to be of Dinah McNicol, was found in the back garden on Irvine Drive on November 17, 2007 in Margate, England.  (Photo by Cate Gillon/Getty Images)

MARGATE, UNITED KINGDOM - NOVEMBER 17: A general view of the area where police are working after the body, believed to be of Dinah McNicol, was found in the back garden on Irvine Drive on November 17, 2007 in Margate, England. (Photo by Cate Gillon/Getty Images)

MARGATE, UNITED KINGDOM - NOVEMBER 17: Police officers carry a drill into the house where the body, believed to be of Dinah McNicol, was found in the back garden on Irvine Drive on November 17, 2007 in Margate, England. (Photo by Cate Gillon/Getty Images)

MARGATE, UNITED KINGDOM - NOVEMBER 17: Police enter the garden where the body, believed to be of Dinah McNicol, was found in the back garden on Irvine Drive on November 17, 2007 in Margate, England. It is the second body to have been found at the house which was previously owned by Peter Tobin, who has been charged with the murder of Vicky Hamilton. (Photo by Cate Gillon/Getty Images)

MARGATE, UNITED KINGDOM - NOVEMBER 17: A police photographer documents details of the investigation near the spot where the body, believed to be of Dinah McNicol, was found in the back garden on Irvine Drive on November 17, 2007 in Margate, England. (Photo by Cate Gillon/Getty Images)

MARGATE, UNITED KINGDOM - NOVEMBER 17: A police photographer documents details of the investigation near the spot where the body, believed to be of Dinah McNicol, was found in the back garden on Irvine Drive on November 17, 2007 in Margate, England. (Photo by Cate Gillon/Getty Images)

MARGATE, UNITED KINGDOM - NOVEMBER 17: A police photographer documents details of the investigation near the spot where the body, believed to be of Dinah McNicol, was found in the back garden on Irvine Drive on November 17, 2007 in Margate, England. It is the second body to have been found at the house which was previously owned by Peter Tobin, who has been charged with the murder of Vicky Hamilton. (Photo by Cate Gillon/Getty Images)

MARGATE, UNITED KINGDOM - NOVEMBER 17: Police officers and forensic archaeologists continue their search and investigation outside the house where the body, believed to be of Dinah McNicol, was found in the back garden on Irvine Drive on November 17, 2007 in Margate, England. It is the second body to have been found at the house which was previously owned by Peter Tobin, who has been charged with the murder of Vicky Hamilton. (Photo by Cate Gillon/Getty Images)

MARGATE, UNITED KINGDOM - NOVEMBER 17: Nicola Downing and Mark Drage leave their house, where they've lived for twelve years, and where the body of Dinah McNicol was found yesterday in the back garden on Irvine Drive on November 17, 2007 in Margate, England. It is the second body to have been found at the house which was previously owned by Peter Tobin, who has been charged with the murder of Vicky Hamilton. Both McNicol and Hamilton went missing in 1991. (Photo by Cate Gillon/Getty Images)

Police officers prepare to carry a pneumatic drill into the house on Irvine Drive in Margate, England where the body, believed to be of Dinah McNicol, was found in the back garden, 17 November 2007. Police searching the former home of a man charged with murdering a teenage girl who disappeared from central Scotland 16 years ago have found a second body, they said 16 November. The remains were found at a house in the town of Margate, south-east England, where Peter Tobin, 61, used to live. AFP PHOTO / LEON NEAL (Photo credit should read Leon Neal/AFP/Getty Images)

A police officer stands guard on the pavement near to where the body, believed to be of Dinah McNicol, was found in the back garden of a house on Irvine Drive in Margate, England, 17 November 2007. AFP PHOTO / LEON NEAL (Photo credit should read Leon Neal/AFP/Getty Images)

MARGATE, UNITED KINGDOM - NOVEMBER 17: A spokeswoman for Essex Police reads a statement from Nicola Downing and her family who rented the house on Irvine Drive where the body, believed to be of Dinah McNicol, was recently found in the back garden of a house, on November 17, 2007 in Margate, Kent, England. It is the second body to have been found at the house which was previously owned by Peter Tobin, who has been charged with the murder of Vicky Hamilton. (Photo by Cate Gillon/Getty Images)

Police vehicles and media trucks surround the area where the body, believed to be of Dinah McNicol, was found in the back garden of a house on Irvine Drive in Margate, England, 17 November 2007. Police searching the former home of a man charged with murdering a teenage girl who disappeared from central Scotland 16 years ago have found a second body, they said 16 November. The remains were found at a house in the town of Margate, south-east England, where Peter Tobin, 61, used to live. AFP PHOTO / LEON NEAL (Photo credit should read Leon Neal/AFP/Getty Images)

Police officers carry bins into where the body, believed to be of Dinah McNicol, was found in the back garden of a house on Irvine Drive in Margate, England, 17 November 2007. Police searching the former home of a man charged with murdering a teenage girl who disappeared from central Scotland 16 years ago have found a second body, they said 16 November. The remains were found at a house in the town of Margate, south-east England, where Peter Tobin, 61, used to live. AFP PHOTO / LEON NEAL (Photo credit should read Leon Neal/AFP/Getty Images)

A forensic archaeologist leaves the excavated area where the body, believed to be of Dinah McNicol, was found in the back garden of a house on Irvine Drive in Margate, England, 17 November 2007. AFP Photo / LEON NEAL (Photo credit should read Leon Neal/AFP/Getty Images)

A forensic archaeologist works 17 November 2007 around the excavated area where the body, believed to be of Dinah McNicol, was found in the back garden of a house on Irvine Drive in Margate, Britain. AFP PHOTO / Cate Gillon / GETTY IMAGES / POOL (Photo credit should read Cate Gillon/AFP/Getty Images)

A forensic archaeologist works 17 November 2007 around the excavated area where the body, believed to be of Dinah McNicol, was found in the back garden of a house on Irvine Drive in Margate, Britain. AFP PHOTO / Cate Gillon / GETTY IMAGES / POOL (Photo credit should read Cate Gillon/AFP/Getty Images)

A forensic archaeologist works 17 November 2007 around the excavated area where the body, believed to be of Dinah McNicol, was found in the back garden of a house on Irvine Drive in Margate, Britain. AFP PHOTO / Cate Gillon / GETTY IMAGES / POOL (Photo credit should read Cate Gillon/AFP/Getty Images)

MARGATE, UNITED KINGDOM - NOVEMBER 19: Police dig up the front garden of a house at Irvine Drive on November 19, 2007 in Margate, England. The bodies of Dinah McNicol and Vicky Hamilton have been found at the house which was previously occupied by Peter Tobin, who has been charged with the murder of Vicky Hamilton. Both women went missing in 1991. (Photo by Peter Macdiarmid/Getty Images)

MARGATE, UNITED KINGDOM - NOVEMBER 19: Police dig up the front garden of a house at Irvine Drive on November 19, 2007 in Margate, England. (Photo by Peter Macdiarmid/Getty Images)

MARGATE, UNITED KINGDOM - NOVEMBER 19: Police dig up the front garden of a house at Irvine Drive on November 19, 2007 in Margate, England. (Photo by Peter Macdiarmid/Getty Images)