How does any of this excuse Murray? Having so many demerol shots proves that Dr Klein was an idiot who didn't care about Michael either. It still has no bearing on Murray does it?
In fact, this defense just makes things worse for Murray. If MJ was, as they're speculating, forming an addiction/dependency or whatever, why the hell was Murray giving him more drugs? Did he not recognise that Klein was also giving him stuff in the day? Why didn't he demand to have the medical records from Klein?
The saddest part is MJ was being mistreated during the day and during the night- two bad doctors not being ethical enough to STOP.