[It's somehow less weird talking about this with Aela, probably because she's so blunt about it.]

...You know how I mentioned the undead? It's caused by a virus, it brings a person's body back to life. They're not themselves anymore, though. The person's mind, or...soul or whatever, is completely gone, it's just kind of a shell wandering around. They tend to kill people just on instinct to try to eat them, because they don't really care what they eat anymore and people are as good a good source as any.

My employers decided to have me executed for doing something they don't like. I got shot a whole bunch of times with those guns I told you about. Apparently I got infected along the way, I was killed in my lab so there were contaminants around. So I died, went full undead and proceeded to kill my wife and kid before I was brought down.