Four people have been arrested in connection with the murder of convicted peadophile Andrew Heath.
He was found dead at his flat in Warndon, Worcestershire in December last year after a suspected arson attack.
At around 7.00am this morning, a man in his 20s was rearrested at an address in Ronkswood on suspicion of murder having been first arrested in January.
Three other people, a woman in her 40s and a woman and a man in their 20s were all arrested at houses in Warndon on suspicion of perverting the course of justice.
In April police confirmed 52-year-old Andrew Heath was convicted for gross indecency and indecent assault against teenage boys five times during the 1980s and 1990s. These assaults happened in Birmingham and Leicester before he moved to Worcester.
In April Detective Chief Inspector Paul Williamson, who is leading the operation, said:
West Mercia Police say they have no records of any offences or complaints against him since he moved to Worcester.
DCI Williamson said:
In April police increased the reward for information leading to the arrest of Mr Heath's killer from £10,000 to £20,000.