Four years after Michael Jackson died, his oldest son is ready to tell a jury about the last days of his life. 

Prince Jackson, now 16, was 12 when he followed an ambulance carrying his father to Ronald Reagan UCLA Medical Center on the afternoon of June 25, 2009. 

On Monday, in the Jackson family's wrongful death lawsuit, Jackson lawyers informed AEG Live attorneys that Prince will be the next witness after a doctor who is an expert in medical conflicts of interest completes his testimony Tuesday. 

That would likely put Prince on the stand Wednesday, a day after the fourth anniversary of his father's death. 

Paris Jackson: Superstar's daughter builds own identity in spotlight 

Prince, Paris and Blanket Jackson and their grandmother Katherine Jackson are suing AEG Live, accusing their father's last concert promoter of negligently hiring, retaining or supervising Dr. Conrad Murray, who was convicted of involuntary manslaughter in Jackson's death. 

Jackson lawyers argue that the promoter and producer of the "This Is It" shows pressured Murray to get Jackson to rehearsals but failed to get Jackson help despite numerous red flags that he was in trouble. 

Murray told police he used the surgical anesthetic propofol nearly every night for two months to treat Jackson's insomnia. The coroner ruled that an overdose of propofol killed him. 

AEG Live lawyers argue that Jackson chose and supervised Murray and that their executives had no way of knowing the doctor was using the dangerous treatment. 

Remembering Michael Jackson's music 

A medical conflict of interest 
What condition was this medication being used to treat?
to treat Jackson's insomnia