If BR only drove as far as Calder Park and back, he should have been home within about 35-40 minutes. If he left around 10:30, he would have been back by 11:10. Police appear to be saying that there's 100 minutes unaccounted for, which would imply that instead he arrived home around 12:50. Perhaps that's confirmed by CCTV or is for some other reason undisputed. Today police are said to have arrived with a Mercedes at Oakley Drive at 12:50. What does it mean?