The family of a 31-year-old man stabbed to death in Welwyn Garden City have described him as 'wonderful and loving.'
Andrew Mason died after an incident in a communal area of a block of flats in Ley Walk on Saturday 16 June 2018.
Hertfordshire Police say they believe those involved were know to each other and officers are treating it as an isolated incident.
Mr Mason was the father of a 12-year-old daughter and the eldest of three brothers. He was the son of Vici Mason and Adrian Thorlby.
Two men have been charged in connection with the incident.
Matthew Fathers, 30, from Welwyn Garden City, has been charged with murder. Darryl Daley, 46, also from Welwyn, has been charged with attempted robbery.
A third man, 26, from Welwyn Garden City, has been arrested on suspicion of assisting an offender and released on bail while enquiries continue.