I tried to come up with a defense for Murray, but I wasn't interested in it enough to pursue it very long.
My first thought was to go to the California manslaughter code. I thought I might find something in there to argue that while Murray might have been an idiot it didn't rise to the level of a manslaughter conviction.
Unfortunately, the statute is a bit vague and at least this non-lawyer couldn't find much there that was gong to help Murray:
California PC 192 (b) said:
(b) Involuntary--in the commission of an unlawful act, not amounting to felony; or in the commission of a lawful act which might produce death, in an unlawful manner, or without due caution and circumspection. This subdivision shall not apply to acts committed in the driving of a vehicle.
It sounds like all one needs to do is do something "without due caution and circumspection" that results in the death of another individual and you are guilty of involuntary manslaughter in California. Murray obviously met that criteria. However, I doubt the statue is interpreted that broadly so more research would be needed to figure out if what Murray did would normally constitute enough to be found guilty of involuntary manslaughter. I'm not interested enough to do that but the casual reading of the opinion of several lawyers seemed to be that what he seems to have done was bad enough to be found guilty of involuntary manslaughter.
2. I tried searching the web looking for people advocating for Murray. I only found obviously uninformed people making the case that Murray wasn't guilty.
3. I looked at what the defense had to say. I quickly realized that I didn't have enough knowledge of the case to analyze the defense points very well. TMZ's summary is here:
http://www.tmz.com/2011/11/03/conrad-murray-closing-arguments-defense/#.TtVo3e3Nm0U
It's pretty hard to pick out a few that looked credible enough to mount a defense with though.
4. I also took a look at the testimony of the doctor that testified for the defense (White). I didn't see much there that was helpful to the defense. Especially, if you buy Rolfe's theory, that Murray is guilty even if Jackson self injected because Murray shouldn't have left the stuff around for Jackson to self inject it.
So bottom line, I don't seem to be able to mount much of a defense for Murray, but maybe somebody else could find something?