The father of slain teen Emily Longley hopes her killer and his family understand what they have done.

The family of Scott Guy have spoken after a jury today found his brother-in-law Ewen Macdonald not guilty of his murder, saying their lives have been changed forever by the death of a son and brother, the pain at times almost too much to bear.

Police confirm father-of-six died of natural causes as he tried to stop a brawl outside his home yesterday.

Geoff Smith says his wife wouldn't have wanted him to hold any malice.