Three people have been arrested in connection with the death of John Roberts from Winlaton in Gateshead.
The 32-year-old was found dead at his home in Park Terrace on December 16th 2012.
Three men aged 27, 21 and 17, and a 16-year-old girl who were previously arrested on suspicion of murder remain on bail.
A 15-year-old girl who was arrested on suspicion of perverting the course of justice also remains on bail.
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The victim was walking her dog last month in an area known to locals as 'Black Bobby's Field'.