‘It will be alleged the kitchen knife was positioned on the right of the driver’s seat,’ Senior Sergeant Kate Vivian said.
The car had been seen earlier by police and sped away before it was seen again on Charles Street in North Perth about 2.47am.
It will be alleged the driver made a U-turn before being pursued by police along Green, Main and Hutton streets in Osborne Park, the Mitchell Freeway, Newcastle, Fitzgerald, Carr and Vincent streets in North Perth to Lake Monger Drive, then along Grantham Street and The Boulevard in Floreat.
Police claim the driver of the vehicle travelled at speed and ignored stop signs and red lights.
Two Wembley police patrol cars intercepted the car on Stubbs Terrace in Shenton Park.
Snr Sgt Vivian said officers had to smash the car’s window to gain entry, where they found the driver to be ‘erratic and unco-operative’.
He was taken to Sir Charles Gairdner Hospital for a psychiatric evaluation and will be summonsed to court on charges of reckless driving, failing to stop and possessing the knife.
His mother, of Mirrabooka, was found unharmed. Police helped her from the car and she was given a checkup at hospital.