I've only written a few death scenes, but they were all very violent or implied to be violent.
The first was a second-person practice piece (I dunno why -- I felt like it), and "you" were extremely wounded after saving the world.
The second...well, I had to edit out detail, but the murderer was a psychopath/sociopath/omnicidal maniac, and used a serrated knife to make a Y incision on his victim (I never explicitly stated that, but I described the cut), and I took off the dying part because he cut out the guy's heart, keeping him somewhat alive with magic (long story short, he was a magic psychopath/sociopath/omnicidal maniac). It only went up to when he finished the incision, though. I have to say that that scene was my favorite part to write of the entire thing. ^^'
I wanted to post the piece for critique, but I'm reluctant to do so since it's pretty gory, even without the heart-cutting-out part...
Another one involved someone getting shot through the skull. Fun times.