In 1984 the brothers embarked across the U.S. and Canada on the Victory Tour, the Jacksons final concerts together. Afterwards, Jermaine said, he had very little contact with Michael for eight years. He says that his calls and letters to his little brother received no response.
"It's not that he didn't want to see me," Jermaine said, but acknowledged that his brother lived a very different life, and didn't carry a cell phone.
"Can you imagine him having a phone? It's like the president having a cell phone...," he said.
"This Is It" was set to be Michael's first solo tour in 13 years, and his hotly anticipated 2009 comeback. He was gearing up for a 50-night run at London's 02 Arena when he unexpectedly died at his Los Angeles home after being administered a lethal dose of propofol, a powerful intravenous sedative.
The pop star's personal physician, Dr. Conrad Murray, is accused of killing Jackson by allegedly administering an overdose of intravenous and prescription drugs. His attorneys have denied he did anything to cause Jackson's death. Jury selection for Murray's involuntary manslaughter trial is now underway.
Jermaine Jackson blamed Murray and the drug for his brother's death, which he heard of by telephone on June 25, 2009.
"And to hear my mother say, 'he's dead,' to hear her say this, I lost it. It couldn't be. It couldn't be ...," he said. "But when my mother said, 'he's dead,' I knew," he said.
For Jermaine, the brotherly love that the two had never wavered. In 2009 he was able to have one final look at the little brother he loved, on his deathbed.
"And there he was, laying there," he told ABC News. "And La Toya was there before us. And he was lifeless. I touched his forehead, his face. And it was still soft. And I kissed him. And I pulled back his eyeballs to look in his eyes. And I just told him how much I love him and, 'I'm gonna miss you so much.'"
Walking through the Jackson family compound, Jermaine describes his feeling for Michael today.
"I find myself saying, Michael, you're supposed to be here," he said. "You have so many more years left on your life."