Here is the story from Dan Rafael of espn.com/boxing

Abraham's brother arrested

After the fight, Alexander Abraham, the younger brother of Arthur, was arrested by Seminole police.

Alexander Abraham was part of his brother's entourage and allegedly jumped into the ring and kicked Miranda while he was being attended to by a ringside physician immediately after the fight.

Alexander Abraham was quickly taken into custody by police and removed from the building.

He was transferred to the Broward County Sheriff's Office, where he arrived at approximately 2:15 a.m. Sunday and was awaiting processing, according to Jacqueline Whitfield, the clerk on duty.
Alexander Abraham, 26, who lives with his brother in Berlin, Germany, is also a professional boxer. He is a junior middleweight with a record of 21-0-1 with 15 KOs.
Arthur Abraham could face a possible fine from the Florida State Athletic Commission for failure to control his team.