Michael Jackson's nephew testified Thursday that he believes his uncle was murdered.

T.J. Jackson, the youngest son of Jackson brother Tito, revealed his suspicion while being cross examined by an AEG Live lawyer in the Michael Jackson wrongful death trial.

Jurors also heard him testify about the emotional devastation caused by Michael Jackson's death.

"He was just everything," said T.J. Jackson, who shares guardianship of Michael Jackson's children — Prince, Paris and Blanket — with their grandmother.

Michael Jackson's mother and his children contend his last concert promoter was liable for his death because it hired, retained or supervised Dr. Conrad Murray, who was convicted of involuntary manslaughter.