BBC News
By Andrew Picken
image copyrightStuart Graham
image captionColin Marr died in 2007 from a single blow from a kitchen knife following a row with his fiancée
The Crown Office has identified new lines of inquiry into the death of a Fife man who died from a stab wound to the chest.
The 23-year-old s family has gathered new material about the case, challenging the original police conclusion that it was suicide.
Ms Bonar has always maintained her innocence.
Colin s stepdad Stuart Graham handed over a cache of material to Police Scotland, which the family say should be investigated further.