CCTV clue issued for potential witnesses in connection with death of Grantham manTwo arrests have been made as part of police investigationsView Image Do you recognise this vehicle? (Image: Lincolnshire Police)The occupants of a Fiat 500 could be potential witnesses to the death of a 55-year-old man, police have said. On Monday (January 26), Ian Jackson-Winch was pronounced dead in Greyfriars, Grantham after he was believed to be stabbed. The car was in Grantham town centre and parked up on Green Woods Row at around 6.45pm. The occupants then went into the town centre, before returning to the vehicle around 9pm and driving off and turning into Greyfriars.