A man who executed his ex-wife's new husband is facing at least 30 years in jail.

Allan Kimber, 41, was today convicted of murdering Gary Morgan, 37, at Danesbrook Farm in Stanton St John a year ago.

Mr Justice David Calvert-Smith has just sentenced Kimber to life, with a minimum term behind bars of 30 years.

He condemned Kimber for his "arrogance and lack of human sympathy".

There were gasps and cries from the public gallery, where Mr Morgan's widow Helen and his family were sat as the guilty verdict was read out.

The jury at Oxford Crown Court spent eight hours deliberating before convicting Kimber, of Stert Street in Abingdon.

Det Ch Insp Karen Trego, said: "The jury were unanimous in finding Allan Kimber guilty of the murder of Gary Morgan.

"It has been over a year since Gary Morgan was murdered. I am pleased that justice has been done today and my thoughts are with Gary's family.

"Gary was an innocent man who had not done anything to provoke this attack.

"My investigation team were faced with piecing together who could have committed such a horrendous crime.

"Allan Kimber committed a premeditated and cold blooded murder. He bought a series of guns and reactivated them so they would fire.

"He made his own bullets and lay in wait for Gary Morgan.

"Gary's family stand here with me today and add their thanks to all the officers and police staff who contributed to this investigation for their hard work and commitment."

Kimber was married to Helen Morgan and the couple lived in Bicester. Their marriage lasted a year before they split.

Mr Morgan worked with Kimber and Helen at Stagecoach and moved in with her as a lodger. A romance began and the couple then married, moving to Danesbrook Farm.

The jury has been told how Kimber caused problems for them at work.

Detectives found a Walther PPK pistol at Kimber's home after the killing. It had been bought over the Internet as a deactivated weapon but Kimber re-activated and made his own ammunition.

He then attacked and shot Mr Morgan as the victim was driving to work on October 17 last year.

Mr Morgan's body was found in his car and initially it was thought he had died and crashed the car.

The bullet wound was only found during the post mortem on his body.

STATEMENT FROM HELEN MORGAN - GARY MORGAN'S WIFE

Sitting through the trial the past few weeks has been very distressing for us all.

Gary was my sunshine; he tried to find fun in everything. He had a positive effect on most people he came into contact with throughout his short life.

His memory will stay with us all for the rest of our lives.

Now that the trial is over we feel there is closure to a difficult period that has brought distress and anger amplified by allegations made regarding my own character and the suggestion that I was some way involved, all of which were thoroughly investigated and dismissed by police during the early stage of the investigation.

Although Gary can never be brought back, justice is the only consolation for us and Gary's family.

For myself, I can now begin to try and rebuild my life and move on with future plans, taking a leaf out of Gary's book and try to make the most out of what life has to offer.

Support and comfort has come not just from family and friends, but from family liaison officers and the witness service to whom we owe so much.

Justice has been done.