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Killer John Leathem told police they would not find any forensic evidence linking him to the murder of schoolgirl Paige Doherty.
Unseen interview tapes have been released and capture the moment the deli worker replies 'no comment' when asked if he killed the 15-year-old.
He is quizzed as to whether they will find any forensic evidence linking him to her death and he replies "no".
"Are you sure about that?" one of the detectives asks.
To which, Leathem chillingly replies: "Positive".
Leathem was found guilty of Paige's murder in 2016 and is serving a 23-year sentence in prison, reports the Daily Record.