Esther McVey is demanding government tighten the law to ensure murderers who fail to disclose where their victims are buried remain behind bars for life.
Before a killer can be considered for parole, they must say where their victims are.
But Ms McVey said a potential loophole in the law could allow false locations to be provided and said information given must lead to findings.
Speaking in Parliament she raised the case of 27-year-old Chantel Taylor who was murdered in 2004 by Stephen Wynne.
Ms McVey said: “The Prisoners (Disclosure of Information About Victims) Act 2020, also known as Helen’s Law prevents the early release of murderers who do not disclose the location of the victims remains. However, there are loopholes where the murderer makes a disclosure, but no remains are found as in the case of Jean Taylor’s daughter Chantel.
“Would the minister meet with meet with me and Jean, who founded the charity Families Fighting for Justice to close down those loopholes.”
Wynne took police to multiple locations where he said he dumped Chantel’s body, but she was never found, and the family were forced to hold a funeral with just traces of her DNA from the murder scene.
Justice Minister Alex Davies-Jones asked Ms McVey for more information on the case and will then get back to her to discuss closing the loophole.
