I haven't heard that either. Did he give him the meds with the intention of killing him??? If not, then how is that right? If that's the case, should every doctor who prescribes a pain pill be charged if that person abuses the pain pills??? I'm not saying the doctor is innocent in this, but he's surely not to fully blame. Michael Jackson was a human with a mind of his own and he chose to go back over and over for his meds.
For one, pain is not a choice.
For two, if he was addicted (I think it's a fair assumption to say he was), it's not some random choice. You don't wake up every day and think "well, I kinda want some drugs, but I don't really...hell let's go get them!" Hopefully that's not how you envision drug addiction -.-