Ontario Provincial Police hope family photos and video will help build a murder case against four men charged with the fatal beating of a Mississauga man over the May long weekend.

Police found Bradley Van Diepen, 28, badly beaten when they responded to a call regarding a serious assault at Trudeau Park in Tweed at about 6 a.m. on May 22.

Van Diepen was transported to the Kingston General Hospital where he died from his injuries.

Bernard Rainford, 27, of Barrie; Brandon Gray, 24, of Pefferlaw; Kadeem Francis, 19, of Belleville; and Colin Rainford, 25, of Markham are all charged with second-degree murder. All four men are being held in custody.

Although police have already interviewed 2,100 people in connection with the case, they believe many more witnesses who used the park over the busy long weekend are yet to come forward.

Now, police are asking anyone who was in the park to send investigators personal photos and video to help recreate the scene.

Anyone with information about the case is asked to contact Ontario Provincial Police at 613-473-4234, or contact their local police service.