Steven Trewin is accused of assaulting Cassandra Swann who was then 19 . She was at Northbridge police station in Perth when the incident happened . In the video , a police officer is seen taking a blonde woman by the arm . She is seen attempting to grab the police officer by his neck with her hand . He is then seen forcefully throwing her to the ground in one rapid motion . Trewin claims he was stopping Ms ##n , who was drunk , from hitting him .
Steven Trewin is accused of assaulting Cassandra Swann who was then 19 . She was at Northbridge police station in Perth when the incident happened . In the video , a police officer is seen taking a blonde woman by the arm . She is seen attempting to hit the police officer by his neck with her hand . He is then seen forcefully throwing her to the ground in one rapid motion . Trewin said he was stopping Ms Swann , who was drunk , from hitting him .