Police have arrested a woman as part of their investigation into the stabbing in Bexley Reserve on 14 November.
Nigel Wilson, 62, was found with multiple stab wounds, near the Pages Road entrance.
He passed away at Christchurch Hospital on 22 November.
A third person, a 32-year-old woman has been charged with Accessory After the Fact to Murder and is oscheduled to appear in Christchurch District Court on Friday 16 December.
Police have already charged a 23-year-old woman with Accessory After the Fact to Murder.
An 18-year-old man is currently remanded in custody, charged with the murder of Mr Wilson.
In a statement police said “We would like to thank everyone in our community who has been in touch with information to assist us in holding these offenders to account.”