Akin and family had been receiving death threats and the FBI was involved.
BTW, when was the last time you joked at a public microphone about murdering someone? My bet...you wouldn’t dream of doing such a thing.
More importantly, this was among a bunch of billionaire Republican donors. Rove was trying to ensure none of them gave Akin any money. He was trying to bury him politically. In that effort he made his “murder” joke.
So, he really wanted to kill him off politically, so he jokes about killing him off literally.