OJ Simpson's slain ex-wife's nephew, Sean Brown, was arrested on Tuesday morning for alleged domestic violence against his live-in girlfriend, Amy Johnson, RadarOnline.com has learned.

According to the booking record, Sean was taken into custody in Orange County, Calif. and is being held on $50,000 bail.

"Police responded to a domestic violence call at about 2:30 a.m. and after an investigation was conducted both parties were taken into custody," Commander Stephen Colon of the Santa Ana Police Department told RadarOnline.com.

"Both parties sustained physical injury but neither required hospitalization."

Casey Anthony may not be off the hook yet – she still could face a possible wrongful death lawsuit being masterminded by the man who pinned a multi-million dollar judgment against O.J. Simpson.

After a jury acquitted Anthony of charges that she killed 2-year-old daughter Caylee, a famed celebrity lawyer has signed on to represent Donna MacLean, a Massachusetts woman who claims to be the tiny tot's lost grandmother.

PHOTOS: Casey Anthony In Court For Sentencing

Casey Anthony's murder trial will go down in history as one of the most shocking verdicts of all time, and now RadarOnline.com is taking a look back at other notorious murder cases which have gripped the world.

From Phil Spector and Albert Fish to Aileen Wuornos and Diane Downs, murder trials have fascinated people for years.

PHOTOS: Most Notorious American Murder Trials

Casey Anthony's 'not guilty' murder verdict has stunned the world and now as she walks free on charges of killing her 2-year-old daughter, Caylee, RadarOnline.com is bringing you America's most shocking court case finales.

PHOTOS: Most Shocking 'Not Guilty' Verdicts

OJ Simpson
In perhaps one of the most controversial court battles of all time, the former professional football player was acquitted of murdering his ex-wife Nicole Brown Simpson and her friend Ronald Goldman in 1995.

It was the verdict heard across the world, and celebrities were just as shocked by the Casey Anthony verdict as the rest of us.

Moments after it was announced by a jury of 12 in Orlando, Florida, Tuesday, that Anthony was found not guilty of first-degree murder or manslaughter of her two-year-old daughter, Caylee, celebrities took to their Twitter pages with their opinions on the matter.

"Casey Anthony not guilty??.....it's a disgrace. She'll probably get her own reality show now," Sharon Osbourne wrote.

The nation is riveted by the Casey Anthony trial, and now Hollywood’s most famous reality star has weighed in with her expert opinion.

Kim Kardashian, daughter of famed OJ Simpson lawyer Robert Kardashian, expressed her feelings about the trial on Tuesday.

“I believe Casey is guilty but there’s so many conflicting stories raising so much reasonable doubt – I feel this will be a shocking outcome,” she Tweeted about the first-degree murder case.