David Brickwood, a 74-year-old father and grandfather who lived in Lindsey Avenue, Abington, was murdered at his bedroom on the morning of Saturday, 26 September, 2015.
Nobody has been charged in relation to Mr Brickwood’s death.
CCTV footage, which has been released by detectives to the Chron today, shows two cars - a light coloured Ford Focus MKI and a dark coloured Ford Focus MKII - travelling to the area of Mr Brickwood’s house just before the murder and leaving quickly, shortly after the attack.
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Detective Chief Inspector Mick Graham, who is leading the murder investigation, said: “They are both Ford Focus’, one light and one dark in colour.
“On the footage, you can see them travelling between Wellingborough Road and Lindsay Avenue. They turn into Lindsay House, reverse the car, switch off the headlights and drive slowly down Lindsay Avenue.
“They are clearly together because once they come past David’s house they turn around at the same point near the Cost Cutter on Lindsay Avenue. Both cars can then be seen travelling away from the scene at speed, moments after the attack. “We believe the drivers and passengers may have been involved in David’s murder.
“On the footage you can also see people walking through Lindsay Avenue some time before the murder occurred. They may have witnessed something.”
Part of the footage was seen by BBC Crimewatch viewers last night (Monday), with detectives hoping the appeal would help bring forward witnesses and information to help solve Mr Brickwood’s murder.
Detectives said there has been a good response to Crimewatch which saw a reconstruction of the night Mr Brickwood was killed.
Officers were called to Mr Brickwood#s house just after 2am on Saturday, September 26. At the scene, it was apparent that David Brickwood had been violently assaulted and had suffered multiple stab wounds to his head, leg and hand.
Officers performed emergency first aid in an attempt to save his life, but sadly he later died at Northampton General Hospital. It is believed that intruders broke into the house by removing a pane of glass from a window.
DCI Mick Graham said: “This was a dreadful assault on a man in his own home. The level of violence used was completely unnecessary for a man of his age.
“We know that David kept a large amount of money in his property. We know that some of the £50 and £20 notes were old fashioned ones and therefore may be easy to recognise. The offenders may have had a lot of blood on their clothing. David was stabbed five times. We want to know if anyone out there noticed anyone acting suspiciously that night or clothing that was stained.”
He added: “There were six people seen outside David’s house at around 11.45pm, three men on one side of the road and two men and a tall woman with blonde hair on the other. The group appeared to be together. There were reports of shouting on the corner outside David’s house. These people may have been there completely innocently, but we need them to urgently come forward as they might hold vital information.”
Crimestoppers are offering a £10,000 reward for information leading to an arrest and conviction.
Anyone who knows anything about this incident is asked to either contact the police on 101 or call the independent charity Crimestoppers anonymously on 0800 555 111 or use their anonymous online form at www.crimestoppers-uk.org.