This link says it was the fiancé:
http://www.lapresse.ca/actualites/j...tre-de-samantha-higgins-un-suspect-arrete.php
A young man of 22 years was arrested in the last hour by the Sûreté du Québec (SQ) for the murder of Samantha Higgins, a young mother found dismembered in Montérégie.
According to our information, it would be the fiancé of the victim, however, that the SQ would not confirmer.Samantha Higgins, 22, disappeared on the night of Monday to Tuesday last week coming back from a friend's in the borough of LaSalle. His family, worried, then launched a campaign to find the mother of two young children.
His body was eventually found Thursday night near a river in Hinchinbrooke, near the US border.