Third murder arrest as investigation continues into Grantham deathThree men are in police custody after the death of Ian Jackson-WynchView 2 Images This remains an active investigation (Image: Laycie Beck)A third man has been arrested on suspicion of murder following the death of a man in Grantham. Ian Jackson-Wynch is believed to have been stabbed and was pronounced dead at the scene. A 55-year-old man was arrested on suspicion of murder, and on Wednesday, January 28, the force confirmed that a 43-year-old man had also been arrested on suspicion of murder. Officers have now confirmed that a third person, a 36-year-old man, has been arrested on suspicion of murder. Article continues below"We have arrested a 36-year-old man on suspicion of murder.