Chronology of Events
A man died after being punched and knocked to the ground in an incident outside the Euro Food Centre in Silver Street, Northampton in August 2013.
The suspects denied manslaughter. Prosecutors say one of the suspects caused the victim to fall after punching him, while the other suspect encouraged and assisted him.
FVS gave evidence at Northampton Crown Court and explained how the CCTV system was only framing at four frames per second and may not have recorded the punch.