Closing arguments have begun at the involuntary manslaughter case of Michael Jackson's personal physician Dr. Conrad Murray today (03.11.11).

Deputy District Attorney David Walgren summed up by telling jurors it was the actions of the doctor that led to the death of Michael from an overdose of anaesthetic Propofol on June 25, 2009.

He told the court: "The evidence in this case is abundantly clear - that Conrad Murray caused the death of Michael Jackson, that Conrad Murray left Prince, Paris and Blanket without a father.

He added that doctors had an obligation to say no when a patient asked them to do something which would be harmful to them, referring to the fact Michael asked for the medicine as a result of his inability to sleep.

Walgren said: "Conrad Murray sought payment for services rendered, the services rendered being the provision of Propofol. Michael Jackson trusted Conrad Murray. But Conrad Murray corrupted that relationship, and for that Michael Jackson paid with his life."

The seven man and five woman jury were told by Superior Court judge Michael Pastor - in front of Michael's family, including his mother Katherine and sister La Toya - they must convict the physician if they believe he either committed a legal act by giving the anaesthetic as a licensed doctor but did so in a criminally negligent way, or if he failed to perform his legal duty as Michael's doctor.

They must agree unanimously on one theory or the other, and must also keep in mind the medical experts who gave opposing testimony about what led to his death.

The jury can also consider testimony which claimed Dr. Murray was an "attentive, informative and compassionate physician".

Dr. Murray pleads not guilty to the involuntary manslaughter of Michael Jackson and may face four years in prison if he is found guilty.