TWENTY years may have passed but the mother of Dr Michael Meenaghan still does not know who killed her son.

On the anniversary of his death, a reward has been put out for information that leads to the capture and prosecution of his killer.

The £20,000 sum may not be life-changing for whoever might have that information, but the revelation of what happened that afternoon in Monks Close, Blackbird Leys, in 1994 will change 82-year-old Pat Meenaghan’s life.

She has had to endure two decades of unanswered questions surrounding the death of her scientist son.

Somebody must have seen something that Saturday, December 4, at the 33-year-old’s home when he was shot with a shotgun through his kitchen window.

The lack of details must be so frustrating for Mrs Meenaghan.

Even a motive is not known in his case, with theories ranging from his private life, or his work, to a case of mistaken identity.

But there is nothing conclusive so far and police are continuing to keep an open mind. Until someone comes forward and provides that scrap of information that officers can begin to work on anew, it is unlikely this situation will change.

If the money does not tempt someone, the thought of Mrs Meenaghan’s continued plight should.

This case needs to be brought in from the cold file.