Police spokesman Larry Hadfield said in a statement late Thursday Simpson came to police headquarters earlier in the day and registered "in accordance with the law."
It wasn't immediately clear which law required Simpson to register with Las Vegas police. Hadfield referred questions to the state parole board, which didn't immediately provide an answer.
The conditions of his parole dictate he report to his state parole officer on a monthly basis and obtain permission from the Nevada Division of Parole and Probation when he changes his residence.
Division Capt. Shawn Arruti said earlier Simpson plans to live at a home in the Las Vegas area.
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