In January, Haliburton OPP found human remains along Glamour Lake Road in Highlands East Township.
The remains were later identified as 35 year old Deidra Ann Smith and 34 year old Justin Robichaud both of St. Catharines.
Police have charged Jesse James Wallace and Lindsay Ainsworth - both from St. Catharines - with two counts of second degree murder and two counts of indignity to human remains.
Alexis Yorke also from St. Catharines is charged with two counts of accessory after the fact.
All three were remanded in custody and set to appear in court today.