The father of Michael Jackson has filed a lawsuit of wrongful death against the pop star's doctor, Conrad Murray.
The lawsuit, which had been expected, was filed on the first anniversary of Jackson's death, just beating a one-year deadline for an action against the Thriller singer's doctor.
It accuses Murray of giving the star a powerful drug (the anaesthetic propofol) and being slow to call for medical help.
California authorities have already charged Murray with involuntary manslaughter in connection with the case and he faces up to four years in prison if convicted.
Jackson died a year ago: His doctor Conrad Murray stands accused
Michael Jackson's mother has unveiled a memorial stone to the singer.
"I want to say thanks to his fans from all over the world for their love and support," Katherine Jackson told a crowd of about a thousand fans who travelled to the modest house in Gary, Indiana, where she raised her nine children.
"This last year has been a very hard time for us, for the whole family. If it wasn't you fans, we could not have made it through."
The two-bedroom, one-story home has become a magnet for tourists from all over the world since Jackson's death.
Jackson's mother Katherine attends the ceremony in Indiana
In the front garden, Mrs Jackson, 80, unveiled an eight-foot granite monument bearing the likeness of her son performing his 'moonwalk' dance.
After her son's death, Katherine Jackson was granted custody of Michael's children Prince, 13, Paris, 12, and eight-year-old Blanket, who, she has revealed, will enroll in school for the first time later this year after having been educated at home for years.
In California, Jackson's sister Janet, brother Jermaine and other family members visited their brother's tomb.
Fans lined up outside the Forest Lawn Memorial Park mausoleum in Glendale. They screamed and offered up flowers, handshakes, and well-wishes to the family as they departed.
