Sibling Rivalry

An unexpected gift from a secret Santa arrived. My hands shook with a light tremor as I unravelled the satin ribbon and opened the box. There it was. Lying on a white cotton kerchief, the very knife I used to stab a certain Mr. Victor Carroway. 

The shiny steel caught the light from the desk lamp and glinted as though it were taunting me. Every feature was identical: the ornate handle, the faint stain at the base of the blade where blood had previously dried before I meticulously cleaned it. My heart thudded in my chest, and my first thought was to slam the box shut and throw it in the fire.