ST Catherine Of Siena Primary School won the Cops and Kids League Tag Day last Thursday.
The Prestons school defeated Busby West Public School in the grand final.
It's the second year the NRL has teamed up with Liverpool and Green Valley police and Blacktown PCYC to put together a day for the youth of the area to build a positive relationship with local police officers through their love of rugby league.
Twenty-three primary schools and 300 pupils from the Liverpool and Green Valley area participated in the event at at Browns Farm Reserve, Hoxton Park.
The highlight of the day was the exhibition match between the NRL Development Staff and police officers against a student All Star team.