The case is now closed because no one from Michael Jackson's family would speak to the police, reported TMZ online.
His sister, singer Janet Jackson, allegedly slapped her teenage niece Paris after she tweeted about her missing guardian and grandmother, Katherine.
Security footage shows Janet and her brother Randy approaching the 14-year-old girl and trying to snatch her cell phone away.
Paris had been on Twitter for days, demanding the whereabouts of her grandmother.
"9 days and counting... So help me God I will make whoever did this pay," Paris had tweeted.
Janet, Randy and Jermaine confronted Paris and her brother Prince, and tried to take away their cell phones.
"This is our house. Not the Jackson family house. Get... out!" Paris allegedly told her aunt and uncles.
There was subsequently a physical confrontation between Randy and Jermaine on one side, and Trent on the other. Cops rushed to the scene.
