Two more people have been arrested in connection with the fatal stabbing of a man at an allotment.
Andrew Jackson's body was discovered near Prospect Drive, Shirebrook, on 26 January.
A post-mortem examination revealed the 55-year-old sustained a stab wound and multiple injuries to his face, torso and limbs.
Police said two 26-year-old men have been arrested on suspicion of murder, taking the total arrests to nine.
Six men, aged between 26 and 44, and a 51-year-old woman, previously detained for the same offence are on bail.
Derbyshire Police said one of the 26-year-olds had been released on bail while the other was still being questioned.
In a tribute, Mr Jackson's family said he had "many great friends" but he had been homeless for a while and their "greatest regret" was losing touch with him.
Crimestoppers has offered a £10,000 reward for information that leads to a conviction.