The New York City Police Department's Internal Affairs Bureau and the Brooklyn District Attorney are investigating another controversial arrest.
Cell phone video of Denise Stewart's arrest was shown first on NY1.
She is seen wearing only her underwear as police try to handcuff her in her building's hallway.
The NYPD says officers got a call that Stewart was beating her 12-year-old daughter.
They also say Stewart resisted arrest.
But the Legal Aid Society says police struck the 12-year-old during the incident.
In a statement given exclusively to NY1, the lawyers say in part, "Police went to the home believing a child was in danger of being abused and end up arresting, handcuffing and striking the child, who obviously panicked at being handcuffed and arrested."
Four members of the Stewart family including the 12-year-old are facing charges ranging from assaulting police to child abuse.
But the family and their attorneys say police came to the wrong apartment and abused them.
"They pepper sprayed a small four-year-old child, Ms. Denise, Ms. Stewart's grandson and one of the male officers assaulted her 12-year-old daughter. What these officers did in this case exemplifies a disrespect for women," said Amy Rameau, Stewart's attorney.
Stewart's arrest took place on July 13, four days before the Eric Garner incident.