Deps created the silent killer as a soft sound swimbait, making very little noise, but putting a nice wake on the surface when the bait is slow rolled under the surface.  The bait is made of a unique soft core with a soft rubber skin like coating on it.  It can be retrieved on the surface (Waking the bait), dead stick retrieve, and subsurface retrieve.  When the bait is retrieved underwater it dives from 1- 1.5 meters.