O. J. Simpson's eldest child Arnelle, 39, called 911 after striking her father so hard during an arguement over his girl friend that he fell to the floor and suffered a slight head injury.

Arnelle had been quarreling with her father's girlfriend, Christie Prody, at O. J. Simpson's home when she criticized Prody for drinking too much. When O. J., 61, told Arnelle not to speak to Prody in that manner, Arnelle pushed her father, knocking him to the floor.

Along with taking issue with Prody's drinking, Arnelle is reportedly angry with her father for giving Prody money while her mother has to work at WalMart to make ends meet.

Arnelle is also reportedly angry with her father for leaving her mother to marry the late Nicole Brown Simpson, who O. J. was accused and acquitted of killing in 1995.

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