Four people have been arrested in connection with the investigation into the death of a 74-year-old who was shot with a crossbow.
Gerald Corrigan was shot on Good Friday while he was putting up a satellite dish outside his home in Holyhead.
A 38-year-old man from the Bryngwran area has been arrested on suspicion of murder and a number of other related offences.
Two other men, a 48-year-old from the Caergeilog area and a 36-year-old from Bryngwran, have been arrested for conspiracy to commit murder, conspiracy to commit fraud and a number of related offences.
A 50-year-old woman has also been arrested on suspicion of money laundering and fraud related offences.
Specialist officers and forensic teams are continuing to search three properties in the Caergeilog and Bryngwyran areas of Anglesey.
Detective Chief Superintendent Wayne Jones said: “We are very grateful for the support and information provided by the community so far, but we are continuing to appeal to those who may have any information, no matter how insignificant they think it might be, to contact us.”
North Wales Police said it has more than 50 officers a and staff working on the case.
Detectives said they believe Gerald was "deliberately targeted and shot."