There is a probably apocryphal tale about Porter Rockwell ( Joseph Smith's bodyguard and crack shot, among other things). When there was an assassination attempt on Boggs, Rockwell was accused. When asked if it was he who shot at Boggs, Rockwell replied, "He's still alive, ain't he?"
It's hard to say just what the facts are with Porter Rockwell, so much sensationalism was built up around him. He was actually arrested for the attempt on Bogg's life, put in jail, but "allowed" to escape. They may have realized their "evidence" wasn't all that good. (Odd, that never seemed to bother them all the times they arrested Joseph Smith on trumped up charges).
The comment I heard Rockwell made was "...I'm just sorry I missed..."