'I always think what it would be like if she was here now': Sister of stabbed Samantha Madgin on growing up in shadow of knife tragedy

She's lived more than half her life in the shadow of tragedy.

In the summer of 2007 Carly Barrett should have been excitedly planning her future while looking forward to her first holiday abroad with friends.

But at the age of just 16 her world was turned upside down by her beloved big sister's murder.