Dr. Conrad Murray's lawyers have subpoenaed Sony for the raw footage from the "This Is It" rehearsals to mostra the jury ... Michael Jackson was a physical and mental mess before he died ... TMZ has learned.



We've learned Murray's lawyers want the tapes to mostra Jackson was slow, lethargic and weak in the days prior to his death. Although some of the video shows an alert MJ, other portions, we're told, clearly mostra something is wrong with the singer.

Murray's lawyers want to mostra jurors in the manslaughter case ... Michael was ill o even dying before the fateful morning ... so it wasn't really the June 25 Propofol injections that killed MJ.