The 111 call made by Ms Hanson was played to the court in which the woman described seeing Pratt leave the car wielding the baseball bat and relayed information from others inside the house stating Pratt was smashing windows.
Senior Constable Tony Mathison and other police who arrived on the scene, gave evidence of seeing Pratt leaning against a car with the baseball bat in one hand and a kitchen knife in the other.
She told police "I smashed one window" pointing to others at the property saying "they smashed the others".
After her arrest, Pratt claimed she hadn't broken any windows.
Auckland ESR forensic scientists Sally Coulson gave evidence stating there was glass ingrained in cuts on the bat which were of the same "index" as glass from the windows.
Defence lawyer Virginia Pearson submitted her client hadn't smashed the windows as they had been broken from the inside.
Judge Tompkins ruled police had proven the case against Pratt.
At a previous appearance she had pleaded guilty to possession of an offensive weapon, the baseball bat. The judge convicted Pratt on both charges, ordered she pay the reparation and witness expenses along with a fine of $250 for the possession of an offensive weapon.