The PSNI are appealing for information about a murder which happened in Benburb, Co Tyrone 41 years ago.
John Pat Cunningham (27) was shot by members of a British Army patrol on Saturday June 15th, 1974.
The case has been re-opened and a murder investigation has been started following an assessment of the available evidence.
Police have already made a number of enquiries about this incident and the circumstances surrounding the death of Mr Cunningham.
The officer leading the investigation, Detective Inspector Neil McGuinness, said: "We have now reached a point where it is appropriate and necessary to ask for assistance from not only the local community in Benburb but also from people who may have moved away from the area or are in other parts of the world, if the investigation is to be fully progressed."
"Our objective is to get to the truth of what happened that Saturday morning so that justice can be served," he added.
They PSNI says they want to speak to people who knew Mr Cunningham - what sort of person he was, his interests, his lifestyle and his concerns.
They also want to speak to anyone who has knowledge of any previous incidents involving him and soldiers.
They would like to speak to anyone who was a witness to the fatal shooting at Carrickaness, Benburb at 11:50am on June 15th 1974.
Detectives are also set to be deployed to the Benburb area to engage with the community.