It comes after the disappearance of Ben Smart and Olivia Hope during New Year's in 1998.
He was convicted of the 1998 murders of Ben Smart and Olivia Hope.
He was found guilty in 1999 of murdering Olivia Hope and Ben Smart in the Marlborough Sounds.
Watson was convicted of the murders of Ben Smart and Olivia Hope in 1998.
The now-49-year-old was convicted of the murders of Ben Smart and Olivia Hope.
Watson, 49, was convicted of the murders of Ben Smart and Olivia Hope in 1999.
But victims' advocates are concerned the wounds will be reopened for the families of his alleged victims.