Joan Lawrence, mother of missing Claudia, has been speaking to Calendar's Christine Talbot about her feelings as police start fresh forensic examinations of her daughter's house.
The father of missing university chef Claudia Lawrence said he hoped the new forensic search would help solve the mystery of his daughter's disappearance four-and-a-half years ago.
Peter Lawrence said: "We obviously hope because we need to know what happened to Claudia."
Forensic officers enter the home of missing university chef Claudia Lawrence to begin a new search.
The new search of the house where Claudia Lawrence lived alone in Heworth Road, York, follows the formation of a new Major Crime Unit at the North Yorkshire force.
But senior detectives stressed the move has not been prompted by any new lead.
Detective Superintendant Dai Malyn, who heads the Major Crime Unit, said: "There's no new smoking gun or startling piece of evidence. I wouldn't want people to believe that's the case. This is just part of the review process."
Mr Malyn said the search, which could last a fortnight, was the beginning of a review as part of the new team's remit to look at important cold cases.
He said: "Most cold case review work considers forensic re-evaluation as techniques advance and this case is no different."
The father of missing university chef Claudia Lawrence welcomed the decision to begin a new forensic search of her home.
Peter Lawrence said: "I am grateful for the initiative by the new team investigating Claudia's case to re-visit her house and conduct further investigations there, including DNA testing.
"Advances in forensic science and testing in the past four years make this a very worthwhile exercise, and anything which helps the search to find Claudia, or at least find out what happened to her on that morning in March 2009, is welcomed."
A new forensic search of the home of missing university chef Claudia Lawrence is beginning as detectives launch a fresh review of the case.
The 35-year-old was reported missing four-and-a-half years ago after she failed to turn up for work at York University.
Despite a high profile investigation by North Yorkshire Police involving up to 100 officers, no trace of Miss Lawrence has ever been found.
Officers believe she has been murdered, but no body has ever been discovered.