Lily, almost every article I can find relating to this inquest tries to make a link between SIDS and co-sleeping.
"Each year in Australia over 100 little ones that are placed in their sleeping environment, there's around about 100 who die, just over 100 that die of sudden unexpected death in infancy.
Near half of those deaths are in co-sleeping situations."
(Which, by the way, means that more than half are not in co-sleeping situations!)
"Mr Olle investigated four cases where babies died of SIDS after co-sleeping. Each was sharing a bed with a parent just before or at the time of their death."