Officer who chased boys to Swan River didnât know they drowned until hours later Weâre sorry, this service is currently unavailable. Please try again later. Dismiss Save Normal text size Advertisement One of the police officers who chased a group of boys to the banks of the Swan River before they drowned says she didnât realise two of the teenagers had died until hours after the tragedy. Master Drage, 16, and Master Simpson, 17 â whose first names WAtoday has not published at the request of their families â drowned about 3.30pm on September 10, 2018, while attempting...