I was replying to YOUR post. The one I quoted. So yes; apples and oranges.
Perhaps some people are "allowed to live and testify" and others are offed because they put themselves in positions that make them easy targets. It amazes me how many people who have been sitting on major evidence against government officials have chosen to fly around in airplanes! (See Sherman Skolnick's "A Short History of Airplane Sabotage" for a partial list). Maybe they should take a bus.
Or maybe you should get a bit realistic.
Accidents happen. They happen all the time. Good pilots, good drivers, good sailors, run into problems. Sometimes, there isn't a damned thing anyone can do about it. When you consider that Steve Fossett was not only one of the most experienced, but capable, pilots flying, and he wound up augering it into the mountains around Mono Lake, this story does not surprise me. Context, Amigo. Pippins and Granny Smiths.
Considering how indestructible you consider Rove, why would he even worry about this guy testifying in the first place? If it were me, I'd not only let him testify, I'd encourage it.
Then what? A wrist slap, a couple of months in jail. I'm willing to bet that by the time Rove had spent a couple of weeks in the pokey, President Obama would have already drafted out the pardon, and Rove would have been cleared within fifteen minutes of his release.
Michael Connell was most likely the victim of any number of things: mechanical failure, something he forgot to check before he started the engine, perhaps a cross wind. Any number of things. But an assassination attempt? Oh, please...