Story highlights "Sorry kids, your dad's dead," Prince Jackson says Dr. Conrad Murray told him

Paris was "hit the hardest because she was my dad's princess," Prince says

Prince describes "aggressive" encounter between AEG head and Dr. Murray

The wrongful death trial of AEG Live is in its ninth week in a Los Angeles courtroom

Michael Jackson often cried after talking to AEG Live executives as he prepared for his comeback concerts, his oldest son testified Wednesday.

"After he got off the phone, he would cry," Prince Jackson testified. "He would say 'They're going to kill me, they're going to kill me.'"

His father told him he was talking about AEG Live CEO Randy Phillips and his ex-manager, Dr. Tohme Tohme, Prince said.

Prince, 16, began his testimony Wednesday morning in his family's wrongful death lawsuit against Jackson's last concert promoter, AEG Live.

His first 30 minutes on the stand were filled with videos and photographs of Jackson with his children, but then the questioning by Jackson lawyer Brian Panish focused on the last weeks of his father's life.

Prince testified that Phillips visited Jackson's rented Los Angeles mansion and spoke aggressively to Dr. Conrad Murray the night before his father's death.

Photos: Michael Jackson's children in the spotlight Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Michael Jackson, the King of Pop, died on June 25, 2009. Four years after their father's death, Jackson's children -- Prince, Paris and Prince II, aka Blanket -- have stepped into the spotlight to honor their father's memory and create careers and identities of their own. One of the world's first glimpses at the kids was when photographers caught them leaning out of a limousine in Los Angeles in 2000. Here are more moments growing up Jackson: Hide Caption 1 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – To protect their privacy in public, Jackson would cover his kids' faces with masks and other obscuring accessories. Here, under the gauzy veils, are Paris and Prince during a trip to the Berlin Zoo in 2002. Hide Caption 2 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Michael Jackson with Prince (left), Paris (center), Prince II, aka Blanket (front), and real estate developer Mohamed Hadid in 2008. Hide Caption 3 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Blanket is seen out in public five months after Jackson's death in 2009. Hide Caption 4 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Paris, Prince and Blanket attend the memorial service for Michael Jackson at the Staples Center in Los Angeles on July 7, 2009. Paris paid tribute to her father by saying, "Ever since I was born, daddy has been the best father you could ever imagine ... I just want to say I love him so much." Hide Caption 5 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Paris and Prince dressed as Michael to accept his Lifetime Achievement award at the Grammys in 2010. Hide Caption 6 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – In 2011, Paris, Michael's sister LaToya Jackson, Prince and Blanket donated 13 pieces of original art by MJ to Children's Hospital Los Angeles. Hide Caption 7 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Paris plays football on a boys' team in 2011. Hide Caption 8 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Prince, Blanket and Paris once again honor their father's fashion and legacy at the "Michael Forever Tribute Concert" in Wales in 2011. Hide Caption 9 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – The kids make a coffee run in 2011. Hide Caption 10 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Paris and Prince step out in 2012. Hide Caption 11 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Paris poses with Justin Bieber at the Michael Jackson hand and footprint ceremony at Grauman's Chinese Theatre in 2012. Bieber has called Jackson " an inspiration and an icon ." (The famous landmark is now called TCL Chinese Theatre). Hide Caption 12 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Prince, Blanket and Paris at Grauman's Chinese Theatre in 2012. Hide Caption 13 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Blanket, Paris and Prince at the Los Angeles premiere of Michael Jackson "The Immortal" tour in 2012. Hide Caption 14 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Prince and Paris show their father's hometown some love in 2012. Hide Caption 15 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Paris and Prince speak with fans at a candlelight vigil held at Michael Jackson's childhood home in Gary, Indiana, in 2012. Hide Caption 16 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – LaToya Jackson and Michael's kids pose with the mayor of Gary, Indiana, Karen Freeman-Wilson, in 2012. Hide Caption 17 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Prince, LaToya, Blanket, Monica Gabor and Paris attend a party for Mr. Pink drinks in 2012. Hide Caption 18 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Paris sports a closely cropped hairdo while picking up coffee in May of this year. Just weeks later, the "sensitive 15-year-old" would be hospitalized for a suicide attempt. Hide Caption 19 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Earlier this year, Prince kicked off an acting career by appearing on the TV show "90210." Just as he was back in regular kid mode, out for pizza with girlfriend Remi Alfalah and her family in Los Angeles, Paris was taken to the hospital. Hide Caption 20 of 21 Photos: Michael Jackson's children in the spotlight Jackson children in the spotlight – Prince and Blanket are photographed for the first time since Paris was hospitalized, where she remains today Hide Caption 21 of 21

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"He was grabbing his elbow," Prince said. "It looked aggressive to me. He was grabbing by the back of his elbow and they were really close and he was making hand motions."

He couldn't hear what Phillips was saying to Murray, he said.

Michael Jackson was not there because he was at his last rehearsal, Prince said. He called his father from the security guard shack telephone to let him know Phillips was there. His father asked him to offer Phillips food and drink.

Prince said that was his last conversation with his father.

"Sorry kids, your dad's dead"

Prince recounted the day his father died four years ago. He saw his father "hanging halfway off the bed, his eyes were rolled back," when he ran into the bedroom where Dr. Murray was doing CPR in a futile effort to revive him, he said.

Paris followed him up the stairs, "but we kept pulling her down the stair," he said.

"She was screaming the whole time saying she wants her daddy," he said.

At the hospital later, Dr. Murray told them "Sorry kids, your dad's dead," Prince testified.

Prince was 12 when the pop icon died, but he said his father confided in him about whom he trusted and didn't trust and what he feared as he prepared for his comeback concerts.

Michael Jackson's three children -- Prince, Paris and Blanket -- and their grandmother Katherine Jackson are plaintiffs in the lawsuit, which contends AEG Live is liable in Jackson's death because the company hired, retained or supervised Murray, the doctor convicted of involuntary manslaughter.

Murray told investigators he gave Jackson nightly infusions of the surgical anesthetic propofol to treat his insomnia. The coroner ruled the singer died of an overdose of the drug.

AEG Live executives allegedly created a medical conflict of interest that pressured Murray to pursue the dangerous treatments so Jackson would be rested for rehearsals, while ignoring warning signs that his health was failing, Jackson family lawyers argue.

AEG Live lawyers contend that it was Jackson who chose and controlled the doctor and that company executives had no way of knowing what treatments Murray was delivering.

AEG Live lead lawyer Marvin Putnam's cross-examination of Prince lasted just 25 minutes. It centered on trying to discredit his testimony about Phillips' visit to his home and about cash payments that Prince said his father gave Murray at times.

Prince stood by his story about the Phillips and Murray encounter, although he conceded it could have been two nights before his father's death and not the last night.

The toll of losing their father

Prince's testimony gave Jackson lawyers a chance to show jurors the emotional toll suffered by Jackson's children, which they would have to put a dollar figure on if they conclude AEG Live is liable in their father's death.

"I can't sleep at night," Prince said. "I have a hard time sleeping." The death left him "emotionally distant from a lot of people" for a while, he said.

He's missed sharing with his father "the first day of going to school, having the first girlfriend, being able to drive," Prince testified.

While Paris Jackson's suicide attempt and hospitalization was not brought up in court -- and it is unclear if jurors learned about it in the news -- Prince did speak about his sister.

"I think out of all of my siblings she was probably hit the hardest because she was my dad's princess," he said.

Prince said the questioning of Paris by AEG Live lawyers over two days in March was painful for her. "She had some problems before, after and, I assume, during," he said.

"She definitely is dealing with it in her own way," her brother said.

Paris, who was 11 when her father died, is not available to testify in person in court because she is hospitalized for psychiatric treatment.

While he and his sister no longer want to celebrate birthdays because "it's not the same without" their father, Blanket, now 11, does, Prince said.

"Right now, I don't know if Blanket realizes what he lost," he said. "He was so young. He is still growing up just like I am and he doesn't have a father to guide him."

AEG Live attempted to compel Blanket, the youngest child, to testify, but the judge rejected its request after a psychologist said it would harm the boy.

Changing the world?

Jurors watched a home video of Michael Jackson questioning his three children about how they planned "to change the world" when they grow up.

Prince testified that the video was made at Christmas.

"What's Christmas mean?" Jackson is heard asking his children.

"Love," Blanket responded.

"Who's Blanket going to be to change this world?" Jackson asked.

"I don't know," Blanket, who appeared to be about 5 at the time, answered.

"What does Paris want to do? Be honest search your heart," Jackson said.

"Help the poor," she answered. Paris also said she would like to be a gymnast.

Prince told his father he aspired to be a movie director and architect because he liked "making things."

Private details revealed

Prince, who said his grade point average is 3.68 at the private school in Sherman Oaks, California, at the end of his sophomore year. He is a member of the National Honors Society and received artistic awards at school, he said.

His extracurricular activities include martial arts and working as a mechanic in his school's robotics program, he said. He wants to attend the University of Southern California to study film and business, he said.

His father taught him how "the great ones" made movies, including how to "find shots." He gave him a lens that hung on a necklace that showed what a shot would look like, he said.

Prince said while his school requires a certain amount of community service, he's does more than that. He volunteers at Children's Hospital in Los Angeles in a program that delivers books to young patients "to keep their minds off their problems."

His father "always said you should give back to the community and help out as much as you can," Prince said.

The jury was shown video of Jackson and his children at the Neverland Ranch where they lived until moving after Jackson was acquitted in a child molestation trial.

The family moved after the court case "because there were complications," Prince said. "They ruined it for my dad."

One video showed a giraffe and several alpacas in the Neverland Zoo. "I never really went near them because they would spit on us," Prince said.

The video also showed the carnival rides at Neverland. "We only went there and to the zoo on special occasions because my dad wanted us to remain humble," he said.

When shown a photo of his father sitting with him at a piano, Prince said "I can never play an instrument and I definitely can't sing."

The trial is in its ninth week and is expected to last until August.