David Walgren, the prosecutor in the Michael Jackson trial which began yesterday, has said that Dr. Conrad Murray 'abandoned' his patient when he needed medical attention.

In his opening statement to the court and jury, he said:

"Conrad Murray abandoned Michael when he needed help. It was Conrad Murray's gross negligence, unskilled hands and desire to obtain this contract that led him to not only abandon his patient, but to abandon all principles of medical care."

Jackson died suddenly at the age of 50 in 2009, three weeks before his This Is It Tour and Murray is on trial for involuntary manslaughter.

Kenny Ortega, the show's choreographer, gave evidence yesterday and he said that he felt Jackson was too ill to perform. 

The trial continues today in Los Angeles.

Check out Michael Jackson performing 'Billie Jean' live and a video of the arrival of Jackson's family to the trial: