A further four people have been arrested on suspicion of murder after the death of a 73-year-old man.
David Morgan, also known to some as Davie, was found dead at his home in Brook Street, Raunds, Northamptonshire, in the afternoon of 8 October.
A 52-year-old man from Kettering, a 42-year-old man from Wellingborough, a 42-year-old woman from Kettering and a 42-year-old woman of no fixed abode, have also been arrested on suspicion of murder and burglary.
Northamptonshire Police previously arrested a 38-year-old woman from Thrapston on suspicion of murder before releasing her on bail.