Hopes that those responsible for the Pike River mine disaster will finally be held accountable. 

Police believe they have sufficient evidence to prosecute certain people for manslaughter. 

This week marks 15 years since 29 men died in the West Coast mine tragedy. 

Sonya Rockhouse, whose son died, told Ryan Bridge Police have done their job and now it's a waiting game for justice. 

She says they've always had enough evidence but more has been gathered in extensive forensic investigations over the years. 

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