It's hoped a new app, showing where the nearest automatic defibrillator is across the Thames Valley will help save lives.
Aylesbury Shooting: Witnesses Needed
After a 33-year-old man was shot at an address in Aylesbury on Wednesday morning, police say they've identified some of the people who were in the area at the time.
The senior investigating officer, Detective Chief Inspector Gill Wootton said they are asking people to get in touch if they saw anything.
Police were called to an address in Stour Close in the Walton Court area of the town shortly after 10am after members of the public reported hearing three gunshots.
A man was taken to hospital with wounds to his head and arms.
At around 9:55am an older white man was seen walking a small terrier-sized dog on the far side of the field near to Stour Close, walking towards the location of the shooting.
An elderly white woman was also seen walking away from Stour Close, wearing a long, light blue coat. She was walking a long-haired, golden Labrador.
There was also another woman seen walking a English Bull Terrier-style dog, who came from the back gates of one of the properties in Witham Way.
Two white men, thought to be in their late teens, were also seen in Witham Way, talking to another man who was on crutches.
One of the men was 5ft 10ins to 5ft 11ins, with dark hair and stubble. He was wearing a blue, zip-up, hooded top and jeans.
The other man was between 5ft 6ins and 5ft 8ins, but we do not have any further description for him.
Witnesses have also described seeing a man who was believed to be a delivery driver, in the area shortly after the gunshots were heard.
He is described as a white man, aged in his forties and about 5ft 9ins. He was wearing a dull green uniform and was carrying a clipboard.
If anyone knows who these people are they're being asked to contact Thames Valley Police on the 101 number.
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