Teens' DNA not found on murder weapon used to fatally stab Kayden Moy, court hears

Two teenagers on trial accused of murdering a 16-year-old at Irvine beach did not have DNA on the weapon used in the fatal stabbing, a jury has been told.

A 15-year-old boy and co-accused Jay Stewart, 18, are accused of killing Kayden Moy on May 17, 2025.

A third teenager, Cole Turley, 18, pled guilty to the murder before the trial started at the High Court in Glasgow.

On Monday, jurors heard a second day of evidence from a forensic biologist who described items of note seized as part of the investigation into the killing.

This included a lock-back knife, which the court had heard was the murder weapon.

The forensic biologist previously told the court that only Turley and Kayden’s DNA was found on the knife.

In cross-examination, Donald Findlay KC, defending Stewart, asked what conclusion “scientifically” the forensic biologist had made regarding the “murder weapon”.

“There was no DNA attributed to Jay Stewart on this knife,” she replied.

Mr Findlay asked: “This is consistent with Jay Stewart never having handled that knife in his life?”

The woman replied: “Yes.”

The advocate also asked if she could say whether deposits of Stewart’s DNA found on an extendable baton were deposited at the same time. Mr Findlay said: “Is the answer, ‘I don’t know’?”

She replied: “Yes.”

Ian Duguid KC, defending the 15-year-old, in his questioning put a scenario of the knife murder weapon being passed from the waistband of his client to Turley to commit the murder.

The advocate said: “The knife in its entirety had nothing at all which can be identified from the boy?”

She said: “That’s correct.”

The trial had previously heard that Turley, Stewart and the 15-year-old were part of The Murray Boys gang of East Kilbride, Lanarkshire. Kayden and his friends were stated to be members of the rival Himshie gang.

The trial continues before Judge Lord Scott.