A Perth man who allegedly murdered a complete stranger as the unsuspecting father-of-two sat waiting at a Coolbellup bus stop claims he was insane at the time and doesn’t remember the incident.

Ian Baz Bosch, 43, was waiting to catch a bus about 7.30am on Saturday, November 19, 2016, to go to a shop and buy his 10-year-old daughter a birthday card, and fruit platter for a friend’s birthday party later that day at Adventure World.

He caught his first bus about 7.15am and got off at Coolbellup shops to catch his second bus to his destination.

Around the same time he stepped off his first bus, the accused man, Ben Daly, 30, had just walked through the empty shopping centre corridor and exited near Mr Baz Bosch.